EXAM REVIEW

Perpendicular-A line that intersects at a right angle.

Parallel-Lines that never intersect.

Intersecting-Two lines that cross at any angle.

Perpendicular Bisector-A line that divides a line segment in half and is at a right angle to it.

Angle Bisector-A line that divides an angle in half.

Acute Angle-An angle smaller than 90 degrees.

Obtuse Angle-An angle larger than 90 degrees

Right Angle-Exactly 90 degrees

Base is 50 m and the height is 20 m. Find the area of the parallelogram.

50x20=1000 m squared

The triangle is 60 m squared .

ABC is acute.

DEF is obtuse.

HIK is right.

LMNJ is angle bisector.

Convert Fractions, Decimals,Percents

3/4 x 25= 75/100 divided by 100 = 0.75/1

Fraction out of any whole number

Percent is out of 100

Decimal out of 1

2/5 x 20=40/100

2/5 divded by 5 = 0.4/1

12/14/09- Math Notes

What We Did Today-
Convert each fraction to a decimal number. Round each decimal to the indicated place value, then convert to a percent.
A) 27/56 (tenths)

0.4821428

0.5 x100
= 50%

B) 125/396 (thousandths)
0.3156565
0.316 x100
= 31.6%

C) 1496/2005 (hundredths)
0.746134663
0.75 x100
= 75%

Repeating Decimals- A decimal number with a digit or group of digits that repeats forever... Repeating digits are show with a bar example-
Use a calculator to convert these fraction to a repeating decimal-
A) 1/3 = 0.3333333 OR 0.3 with a bar on the top of the three.
B) 5/9 = 0.5555555 OR 0.5 with a bar on the top of the five.
C) 5/6 = 0.8333333 OR 0.83 with a line on top of the 3

Terminating Decimals-
A decimal number in which the digits stop examples include 0.4, 0.86, 0.125

Homework-
Find each of the following as a percent-
a) 23 out of 80
b) 421 out of 560

Change each terminating decimal number to a fraction-
a) 0.48
b) 0.078
Simplify the expression-



Lastly, construct an angle bisector of a 60 degree angle

Remember, it's the dance on Friday, Be sure to finish ALL your work.
+ Be free to ask questions.