Name __________________________________
Date ___________________
LESSON 1.5
Practice C
For use with pages 35–41
1 and 2 are complementary angles and 2 and 3 are supplementary angles.
Given the measure of 1, find m2 and m3.
1. ml = 43
2. ml = 28°
3. ml = 69.5°
4. ml = 17.5°
Find mABC and mCBD.
5.
6.
7.
In Exercises 8–15, use the diagram. Tell whether the angles are vertical angles, a
linear pair, or neither.
1 and 2
l and 3
2 and 4
4 and 5
6 and 8
8 and 9
7 and 10
10 and 11
The measure of one angle is 7 times the measure of its complement. Find the
measure of each angle.
17. Two angles form a linear pair. The measure of one angle is 15 times the measure
of the other angle. Find the measure of each angle.
18. The measure of one angle is 47 less than the measure of its supplement. Find the
measure of each angle.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Find the values of x and y.
19.
20.
21.
22.
23.
24.
Name _____________________________________
Date ___________________
LESSON 1.5
Practice C continued
For use with pages 35–41
Tell whether the statement is always, sometimes, or never true. Explain your
reasoning.
25. Two vertical angles are adjacent.
26. Two supplementary angles consist of one acute angle and one obtuse angle.
27. An angle that has a complement also has a supplement.
A and B are complementary angles. Find mA and mB.
28. mA = 5x
mB = (17x + 2)
29. mA = (16x  13)
mB = (2x  5)
30. mA = (4x + 31)
mB = (2x + 44)
31. mA = (21x + 12)°
mB = (35x  6)
A and B are supplementary angles. Find mA and mB.
32. mA = (x  11)
mB = (x  15)
33. mA = (9x  12)
mB = (24x  60)
34. mA = (3x  90)
mB = (5x  150)
35. mA = (9x  28.5)
mB = (5x  101.5)
Tell whether the two angles shown are complementary, supplementary, or neither.
36.
37.
38.
In Exercises 39–42, use the star at the right and the angles identified to name two
pairs of the indicated type of angle pair.
39. Supplementary angles
40. Vertical angles
41. Linear pair
42. Adjacent angles
43. Use the star above. Determine the total number of pairs of vertical angles.
Determine the total number of linear pairs. Determine the total number of pairs of
adjacent angles.