## Monday, November 30, 2009

### Area of a Triangle

## Monday, November 23, 2009

### Angle Bisectors

-The space between 2 connecting lines

Acute

-An angle that is less than 90o.

Obtuse

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

Right Angles

-Are angles that are exactly 90o.

Straight Angles

-Are angles that are exactly 180o.

Angle Bisector

-The line that divides an angle into two equal parts.

[Equal angles are marked with the same symbol, O.]

Method 1 to make an Angle Bisector: Fold paper.

Method 2 to make an Angle Bisector:

Get a compass and make an arc (angle for this step) from the vertex that crosses both arms. Label them X, Y. Then make another arc but from X, Y. They must be the same distance from its point, and have to be intersecting. Now when your done that, draw a dotted line down the X,Y's arc intersection. That is your Angle Bisector. It should look like this.

Method 3 to make an Angle Bisector:

Grab a protractor. An <>140o. Divide your angle measurement by 2. 140o/2=70o. (There are more steps, but I missed them, and I do not have the proper diagram drawn. I apologize, but i hope you have an idea for what to do next.

HOMEWORK

1. Make a 68o angle. Then draw the angle bisector using two methods.

2. How could you divide an angle into four equal parts?

3. Has each angle been bisected? How do you know?

Sorry I missed some parts. If I did, be sure to comment on this and tell me.

Hope this was helpful!

## Wednesday, November 18, 2009

### Geometry

**Parallel**- describes lines in the same place that never cross or intersect.

- they are marked using arrows.

**Perpendicular**- describes lines that intersect at right angles (90degrees)

- they are marked using a small arrow.

measure the distance from: A to B = 8.9 cm B to C = 8.9 cm

E to F = 8.9 cm F to G = 8.9 cm

I to J = 8.9 cm J to K = 8.9 cm

Identify any parallel line segment line:

AE is parallel to BF

BF is parallel to CG

EI is parallel to FJ

FJ is parallel to GK

AI is parallel to CK

Parallel lines are always the same distance apart. No matter where you measure as long as you measure using perpendicular lines.

Now using the same picture ^, identify any perpendicular line segments.

AE is perpendicular to DF

BF is perpendicular to EG

CG is perpendicular to FH

1. Are line segments AE and DF parallel?

2. Are line segments DF and BE perpendicular?

3. Are line segments AC and BG perpendicular?

How do you know?

4. Would a line segment joining A to D be parallel to a line segment BE?

How do you know?

### Three Ways To Make Perpendicular Lines

5. Now you can input your right angle in the top right box or the bottom left.

The second way of making bisect perpendicular lines.

1.Using a right triangle draw a line segment on a piece of paper.

2.Still using the right triangle find half of the line segment that you made and make a little mark.

3.Using the right angle of your triangle make another line segment intersecting your original one.

4.Now you can make your ninety degree mark for your right angle.

The third way to make a bisect perpendicular line.

I just found a video to help you with perpendicular lines using a compass.

Just click on this link.

http://www.youtube.com/watch?v=QT28JgIep48I hope you found my scribe post helpful!

## Tuesday, November 17, 2009

### How to draw parallel and perpendicular lines

- Fold Paper
- use a ruler

How to draw perpendicular lines

- Fold paper
- Use protractor

http://www.aaamath.com/

For homework remember to do page 86-88 number 1-16 and do all numbers.

## Monday, November 9, 2009

### test

## Friday, November 6, 2009

### Term Test

Lastly, we have a Term Test on Thursday it will cover the entire term's worth of work. Be sure to start studying now, do not wait until the last minute!

## Thursday, November 5, 2009

### November 5th Mathematics

**Find the amount each shape weights.**

**Today's number of the day is :**

**8497.365**

**:**

**4248.6825**

**8000+400+90+7+0.3+0.06+0.005**

**Eight thousand four hundred ninty seven and three hundred sixty five thousandths**

**8500**

**3**

**16994.73**

**8620.815**

**7509.715**

**343**

**16**

**2393.62**

**181440**

## Wednesday, November 4, 2009

### Number of the Day

**Today's number of the day is:2691.348**

*1. Half of the number of the day is:*

**1345.674***2. Write the number of the day in expanded form:*

**2000+600+90+1+0.3+0.04+0.008**

*3.Write the number of the day in written form:*

**Two thousand six hundred ninety one and three hundred forty eight thousandths***4. Round the number of the day to the nearest 100:*

**2700**

*5. What digit is in the tenths place:*

**3**

*6. The number of the day doubled is:*

**5382.696***7. 123.45 more than the number of the day is:*

**2814.798**

*8. 987.65 less than the number of the day is:*

**1703.698***10. Cube the digit in the ones place:*

**1**

*11. Square the digits in the hundreds place:*

**36**

*12. Divide the number by3.55 and round to the nearest hundredth:*

**758.13**

*13. The product of all digits in the number of the day is:*

**10,368****Don't forget to study for the quiz tomorrow!**

## Tuesday, November 3, 2009

### Home Work

## Monday, November 2, 2009

### Order Of Operations

**There are 4 operations:**

**1st.**

**Brackets**

**2nd.**

**Exponents**

**3rd.**

**Divide**or

**Multiply**in order from left to right.

**4th.**

**Addition**or

**Subtraction**in order from left to right.

5.2 / 4 + 2.1= 3.4