Basic Mathematics for College Students

CHAPTER 9 TEST

1. Estimate each angle measure. Then tell whether it is
   an acute, right, obtuse, or straight angle.
   a. b.

c.

d.

2. Fill in the blanks.
   a. If , then the angles have the same
   .
   b. Two congruent segments have the same.
   c. Two different points determine one.
   d. Two angles are called if the sum of
   their measures is 90°.


3. Refer to the figure below. What is the midpoint
   of?


4. Refer to the figure below and tell whether each
   statement is true or false.
   a. and are vertical angles.
   b. and are adjacent angles.
   c..
   d. and are supplementary angles.
   e. and are complementary angles.

A

B

C

D

G

E

F

EGD AGB

CGD DGF

m(AGB)m(EGD)

EGF DGE

AGF BGC

AEBCD

23456789

BE

ABC  DEF

5. Find. Then find and.


6. Find the supplement of a 47° angle.


7. Refer to the figure below. Fill in the blanks.
   a. intersects two coplanar lines. It is called a
   .
   b. and are alternate interior angles.
   c. and are corresponding angles.


8. In the figure below, and. Find the
   measures of the other numbered angles.


9. In the figure below,. Find. Then determine the
   measure of each angle that is labeled in the figure.

l 1

l 2

x + 20°

2 x + 10°

l 1 l 2 x

37

48

56

(^12) l
1
l 2
l 1 l 2 m(2)25°
l 1
(^87)
(^56)
(^43)
(^12)

 3

 4

l 1

A

D

C

E

B

3 x 2 x + 20°

x m(ABD) m(CBE)

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