## Monday, October 4, 2010

### Michael's math profile.

Last year in grade 7, my favourite unit we studied, was fractions, because it was really easy, and we learned how to add and subtract them. I did well in this unit because, it was very easy for me to understand what was going on, and what was going to come next. The unit I had a hard time was converting the decimals, because sometimes I would get confused.

This year, in grade 8 math, I will become successful, by studying hard and finishing all my homework and getting good grades on tests. I would like to learn more about algebra, and anything else that's new to us and become a better and smarter student for all units.

My favourite blog I did last year, was the one I first did, because it was the day we first learned how to blog and I think I improved throught the year. Blogging helped me a lot because we gave and got feedback from our classmates saying what we can do better next time. I want to do more blogging this year, and just have fun !

## Thursday, June 17, 2010

### Homework Package

Finish !!

Finish !!

Define the words !

Perpindicular: Lines that intersect at a right angle.

Parallel: Two lines that will never cross or meet.

Intersecting: When two lines meet.

Perpendicular Bisector: A line that divides a line segment in half and has right angles to it.

Angle Bisector: A line that divides an angle into two equal parts.

Acute Angle: An angle that is less than 90 degrees.

Right Angle: An angle that is at 90 degrees.

Please finish the homework package & study for you're exams!

## Wednesday, June 16, 2010

### Definitions for math,

Translation- A slide across a line

Rotation- A turn about a fixed point called the center of rotation

Reflection - A mirror image

## Tuesday, June 15, 2010

### Math Exam Review

### Exam Review

Define:

Variable - A letter that represents an unknown number.

Expression - Any single number or variable, or a combination of operations involving numbers and variables.

Equation - A mathmatical statment with two expressions that have the same value.

Eg. Variable a,b,c

Eg. Expression 2,x,2x+1

Eg. Equation 1+1=2, 2x=4 , 2+3=4+1

Find and describe the pattern. ID the next 3 terms.

64,58,52,46,40,34,28

Subtract 6 each time

Is this linear equation x=2y?

False backwards, should be y=2x

Should be y=2x+1

Define:

Mean -The sum of a set of values divided by the number of values in a set.

Median - The middle number in a set of data after the data have arranged in order.

Mode - The most frequently occuring number. It can be used more than one.

Range -The difference between the large and small values in a set.

Outlier - A value that is much smaller or larger than the actual answer.

Find the mean,median,mode,range,and outlier.

75,70,81,77,73,75,80,79,73,17

Mean - 70

Median -75

Mode -73,75

Range -64

Outlier -17

### Exam Review

__When the cost of an item is increased by six dollars, the cost becomes $23.00. Let c=original cost, create and solve an equation.____My new fish tank holds 12 fish which is 2 more than my old tank. Create and solve an equation, let f=old fish tank.____Random practice tests from each chapter choose 2 questions from each chapter practice test and answer them. You can't select the same question number from any chapter.__

### Term 3 Homework Package :

*FINISH THE HOMEWORK PACKAGE.*

*Define :***STUDY FOR:**

## Thursday, June 10, 2010

### Exam Review: Integers

- 7+3=10
- 8-5=3
- 2+4=6
- 3-9=(-6)
- 7+(-3)=4
- 8-(-5)=13
- 2+(-4)=(-2)
- 3-(-4)=12
- (-7)=3=(-4)
- (-8)-5=13
- (-2)+4=2
- (-3)-9=12
- (-2)+-(-4)=(-6)
- (-8)-(-5)=(-3)
- (-7)+(-3)=(-10)
- (-3)-(-9)=6

Use integers to discribe the main floor, the basement, and the third floor.

(-1, o, 2)

Give each an example for:

opposite integer- (+1, -1)

zero pair- (+1)~(-1)

addition statement- (-3)+2=1

subtraction statement- (-3)-2=(-5)

Give an example for each:

(+)+(-)=(+)

(+)+(-)=(-)

(+)-(-)=(+)

(+)-(-)=(-)

~Sorry that I didn't put any pictures of the integer chips, I was in a rush and I thought it would take to much time to do them all~

## Wednesday, June 9, 2010

### Exam Review Study Notes (June 9' 10)

300 ugly kids were asked what is their favourite colour. How many like blue, how many like green, and how many like gold.

Blue:

25/100 = 75/100 or 25% of 300

(x3)

0.25 x 300 = 75

Green:

30/100 = 90/100 or 30% of 300

(x3)

0.3 x 300 = 75

Gold:

45/100 = 135/100 or 45% of 300

(x3)

0.45 x 300 = 135

What is the estimated ratio of the circumference to diameter.

3.14 : 1

Find the circumference when radius is 6cm.

2r = d c=2Лr

2(6) = d c = 2 (3.14) (6)

12 = d or c = 6.2816

c = Л d c = 37.68cm c = 3.14 (12) c = 37.68 cm

Find area when diameter is 1om.

r = d/2

r = 10/2

r = 5m

a = Л r 2

a = 3.14 x 5²

a = 3.14 x 25

a = 705 m²

The measure of a sector is 20% of the data.

What is the central angle for this sector?

20% of 360°

0.2 x 360° = 72°

The central angle 198° what percentage the circle represents?

(divide)

316 198/360 = 55/100

(─316)

I have a pool with a radius of 6m.

My yard is 30m long by 15m, how much space do I have left in my yard?

A yard L x W

= 15 x

= 450 m²

A pool = Л r²

= 3.14 (6)

= 3.14(36)

30 m

= 113.04 m²

450 - 113161 = 336.96m²

STUDY FOR YOU EXAMS!!

## Sunday, June 6, 2010

### Exam Review Study Notes

Pages:

1. 449-451 #3-16

2. 444-445 #1-8

3. 426-427 #1-17

4. 405-407 #1-21

5. 327-329 #1-21

6. 319-322 #1-23

7. 313-315 #1-20

8. 270-272 #1-15

9. 249-251 #1-3

10. 220-221 #1-14

Remember, this is due Monday, June 7, 2010!

If you lost your work that you did or never in the first place, you have to do it again.

Make sure you comment on all the blogs even the old ones.

Make sure you do a blog.

__Define__

Perpendicular- Describes lines that intersect at right angles. (90 degrees)

Parrellel- Describes lines the same place that never cross or intersect.

Intersecting- lines that cross at any angle.

Perpendicular bisector- a line that divides a line segment in half and is at right angles to it.

Angle bisector- the line that divides an angle into two equal parts.

Obtuse angle- angle greater than 90%.

Formula area of triangle-bxh/2

Formula area of parrallelogram-bxh

**Homework Package**

- pg. 449-451 #3-16
- pg. 444-445 #1-8
- pg. 426-427 #1-17
- pg. 403-407 #1-21
- pg. 327-329 #1-21
- pg. 319-322 #1-23
- pg. 313-315 #1-20
- pg. 270-272 #1-15
- pg. 249-251 #1-3
- pg. 220-221 #1-14

- This is due on MONDAY, JUNE 7th 2010
- PLEASE hand it in in the order above
- If you lost it or if you didn't do it, you MUST do it again
- Comment on ALL blogs. Even the old ones.
- Make sure you blog THIS term

**Exam Review Study Guide**

**Define:**

**Perpenducular****-** lines that intersect at a right angle (90 degrees)

**Parallel**

**-**two lines side by side that never meet

**Intersecting****-** when two lines meet** **

**Perpendicular Bisector**

**-**a line that divides a line segment in half and meet at 90 degrees

**Angle Bisector**

**-**a line that divides an angle into two equal parts

**Acute Angle**

**-**an angle that's less than 90 degrees

**Obtuse Angle**

**-**an angle that's less than 180 degrees but more than 90 degrees

**Right Angle**

**-**an angle that's exactly 90 degrees

**Formula Area of a Triangle**

**-**bxh/2

**Formula Area of a Parallelogram**

**-**bxh

**Lable**

Lable the following figures:

a) Parallel

b) Perpendicular Bisectorc) Perpendicular

d) Intersectinge) Angle Bisector

f) Acute Angleg) Obtuse Angle

h) Right AngleFraction->Decimal->Percent

Fraction- out of anything

Decimal- out of 1

Percent- out of 100

### Exam Review Study Guide: June 4. 10 (Part 2)

**Practice**

**Label**

**Answer**

**a) If the**

*base is 50m*and the*height is 20m*of a parellelogram, what is the area?**b) Find the area of the triangle.**

**Label**

**What YOU Must Know!!**

**You must be able to**

*Convert*: Fractions, Decimals ,and Percentages.**When converting something into a....**

**Fraction, it is out of any whole number.**

**Percentage, it is out of 100.**

**Decimal, it is out of 1.**

Try to convert 2/5 into a Percentage and Decimal.

*Fraction - Decimal: Numerator / Denominator

Decimal - Fraction: Convert decimal into a percentage, and convert percentage into fraction. Then simplify.

Percentage - Fraction: Whole number is numerator, and 100 is denominator. Simplify.

Fraction - Percentage: Convert fraction into decimal, and convert decimal into a percentage.

Decimal - Percentage: Decimal x 100.

Percentage - Decimal: Convert percentage into fraction, then convert fraction into decimal.

If I missed anything, comment and tell me!*

1. pg. 449-451, #3-16

2. pg. 444-445, #1-8

3. pg. 426-427, #1-17

4. pg. 405-407, #1-21

5. pg. 327-329, #1-21

6. pg. 329-322, #1-23

7. pg. 313-315, #1-20

8. pg. 270-272, #1-15

9. pg. 249-251, #1-3

10. pg.220-221, #1-14

REMEMBER it is due on MONDAY, JUNE 7

Define:

perpendicular: describes lines that intersects at right angles.

parallel: two lines that never cross or meet.

intersecting: when two lines meet.

perpendicular bisector: a line that divides a line segment in half and is at right angles to it.

angle bisector: a line that divides and angle into two equal parts.

acute angle: an angle that is less than 90 degrees.

obtuse angle: and angle grater than 90 degrees.

right angle: angle exactly 90 degrees.

formula of area of triangle: base multiplied by height. divided by two.

formula of area of parallelogram: base multiplied by height.

### Exam Review Study Guide: June 4. 10 (Part 1)

**Definitions**

*Perpendicular*

*-*Lines that meet at 90°.

*Parallel**-*Lines that never meet.

*Intersecting*- Lines that cross at any angle.

*Perpendicular Bisector*- A line that divides a line segment in half and meets at 90°.

*Angle Bisector*- A line that divides an angle into 2 equal parts.

*Acute Angle*- An angle that is less than 90°

*Obtuse Angle*- An angle that is greater than 90°, but less than 180°.

*Right Angle*- An angle that is exactly 90°.**_____________________________________________**

**Formula:**

*Area of Triangle*- Area = base x height / 2**Formula:**

*Area of Parallelogram*- Area = base x height

### Term 3 Homework package/ Exam Study guide

**Homework Package**

- Perpendicular- describes lines that intersect at right angles ( 90 degrees)
- Parallel- describes line that is in the same plane but never cross or intersect
- Intersecting- lines that cross st any angle
- Perpendicular Bisector- a line that divides a line segment in half and is at right angles to it
- Angle Bisector- a line that dicides an angle into two equal parts
- Acute angle- angle less thatn (90 degrees)
- Obtuse angle- angle greater than (90 degrees)
- Right angle- angle exactly (90 degrees)
- Formula of triangle- b times h divide by 2
- Formula area of parallelogram- b times h

a= 60 m2

**Reminder:**

## Friday, June 4, 2010

1. pg. 449 - 451 # 3 - 16

2. pg. 444 - 445 # 1 - 8

3. pg. 426 - 427 # 1 - 17

4. pg. 405 - 407 # 1 - 21

5. pg. 327 - 329 # 1 - 21

6. pg. 319 - 322 # 1 - 23

7. pg. 313 - 315 # 1 - 20

8. pg. 270 - 272 # 1 - 15

9. pg. 249 - 251 # 1 - 3

10. pg. 220 - 221 # 1 - 14

** Remember, this is DUE MONDAY, JUNE, 7, 2010!!

if you lost your work, or never did it in the first place you have to do it either way!

Exam Review Study Guide-

Perpendicular- Describes lines that intersect at right angles. (90 degrees)

Parallel- Describes lines in the same plane that never crosses or intersect.

Intersecting- Lines that cross at any angle.

Perpendicular Bisector- A line that divides a line segment in half and meet at 90 degrees.

Angle Bisector- The line that divides an angle into 2 equal parts.

Acute angle- An angle that is less than 90 degrees.

Obtuse angle- An angle that is greater than 90 degrees and less than 180 degrees.

Right angle- is exactly 90 degrees.

### Homework Package- Term 3

Our homework package is due on Monday, June 7 2010.

Hand your package to Mr.Isfeld in this order:

1. pg. 449 - 451 # 3 - 16

2. pg. 444 - 445 # 1 - 8

3. pg. 426 - 427 # 1 - 17

4. pg. 405 - 407 # 1 - 21

5. pg. 327 - 329 # 1 - 21

6. pg. 319 - 322 # 1 - 23

7. pg. 313 - 315 # 1 - 20

8. pg. 270 - 272 # 1 - 15

9. pg. 249 - 251 # 1 - 3

10. pg. 220 - 221 # 1 - 14

* If you lost the work or never did it in the first place, You HAVE to do it again.

* Also, Make sure you comment on all the blogs. Even the old ones!

* Everyone should have at least done one blog in term 3.

### Exam Review Study Guide-

Perpendicular- Describes lines that intersect at right angles. (90 degrees)

Parallel- Describes lines in the same plane that never crosses or intersect.

Intersecting- Lines that cross at any angle.

Perpendicular Bisector- A line that divides a line segment in half and meet at 90 degrees.

Angle Bisector- The line that divides an angle into 2 equal parts.

Acute angle- An angle that is less than 90 degrees.

Obtuse angle- An angle that is greater than 90 degrees and less than 180 degrees.

Right angle- is exactly 90 degrees.

Formulas :

Area of a triangle= bxh divided by 2.

Area of a parallelogram= bxh

Base- 50m Height-20m. Find the Area of the Parallelogram.

A= bxh

A= 50x20

A= 1000m "squared"

Find the area:

A= bxh/2

A= 10x12/2

A=120/2

A= 60m "squared"

CONVERT:

fractions->decimals->Percents

3/4 = 75/100= 0.75/1

- Fractions are out of any whole number.

-Percentages are out of 100

-Decimals are out of 1

2/5= 40/100 --> 2/5=0.4/1

Remember to start studying for our exams !

EXAM REVIEW

### Term 3 homework package

Please hand the package to me in the following order.

1. pg. 449 - 451 # 3 - 16

2. pg. 444 - 445 # 1 - 8

3. pg. 426 - 427 # 1 - 17

4. pg. 405 - 407 # 1 - 21

5. pg. 327 - 329 # 1 - 21

6. pg. 319 - 322 # 1 - 23

7. pg. 313 - 315 # 1 - 20

8. pg. 270 - 272 # 1 - 15

9. pg. 249 - 251 # 1 - 3

10. pg. 220 - 221 # 1 - 14

If you are disorganized and can't find your homework from term 3, you will have to redo any pages you are missing. Log on to mytextbook.ca for the pages you need to complete.

## Tuesday, June 1, 2010

### Term 3 Test/ Exam Review Study Guide

**NO EXTRA TIME**

## Monday, May 31, 2010

### Exam Review Study Guide.

Translation : slide across a straight line

Rotation : A turn at a fixed point call Center of Rotation .

Reflection : A flip over a mirror line.

* Mirror can be anywhere; doesn't have to be on an axis .

Reminder : There is only 12 days of school left before exams, start studying tonight, and don't procrastinate to the last minute.

## Tuesday, May 25, 2010

### The Best Measure of Central Tendency

Find Mean, Median, Mode, and Range .

How many shirts should I buy for the next 30 weeks ?

Need help ? Check this link .

**Im sorry guys cant find a video !**

**HOMEWORK**

**PG. 449 - 451**

## Monday, May 24, 2010

### Review and Effects on Outliers

Always Re-order before figuring out all measurements of tendency.

mean: All the numbers added together, divide by home much digits.

median: the middle number OR (if there is no middle number) add the two middle

numbers and divide by 2.

mode: the most number(s) there.

range: diffrence between the largest and smallest values in a data set.

outlier: number(s) that don't really fit with that data set.

Find the mean, median, mode, range, and outlier(s).

a) 12, 20, 18, 15, 10, 12.

b) 48, 32, 67, 61, 47, 95, 89, 888, 1.

a) re-order: 10, 12, 12, 15, 18, 20.

mean: 14.50

median: 13.5

mode: 12

range: 10

outlier(s): No outliers

b) re-order: 1, 32, 47, 48, 61, 67, 89, 95, 888.

mean: 166

median: 61

mode: no mode

range: 887

outlier(s): 888 and 1

Here is a video that covers: mean, median, mode and range.

Here is a video that covers: range and outlier(s).

Effects on Outliers

- Some outliers need to be removed from a data set. This is typically a judgement call.

- Outliers have an effect on ALL measurements of tendency.

HOMEWORK !

PAGES 444 - 445 NUMBERS 1 to 8 !

ALSO, Don't forget, we need to hand in our Number of the Day! So make sure you're done all of it to get a good mark ! :)

## Wednesday, May 19, 2010

### Range and Outliers

**Find the range:**

**a) 7, 4, 3, 6, 2, 5, 8, 3 ----> 2, 3, 3, 4, 5, 6, 7, 8 ----> 8-2 = 6**

**b) 11, 8, 8,5, 7, 6, 7, 6, 6---->5, 6, 6, 6, 7, 7, 8, 8,11--->11-5=6**

**c) -4, 3, -1, 0, 2 ----> -4, -1, 0, 2, 3 ----> 3-(-4) = 7**

**Find the outliers:**

**a) 18, 19, 79, 17, 20, 12 ---> 12, 17, 18, 19, 20, 79 ---> 79**

**b) 14, 14, 16, 15, 1, 16 ---> 1, 14, 14, 15, 16, 16 ---> 1**

**c) 98, 202, 99, 91, 2, 95, 89, 88 ---> 2, 88, 89, 91, 95, 98, 99, 202 ---> 2 and 202**

**HOMEWORK:**

**Page 437 - 439**

**# 1 - 16**