Special Pairsof Angles

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Congruent Angles have the same angle measurement.

14 Are the two angles congruent?

75o110o

A Yes

B No

15 Are the two angles congruent angles?

40o

40

o

A Yes

B No

16 Are the two angles congruent?

75o105o

A Yes

B No

Complementary Angles are two angles with a sum of 90 degrees.

These two angles are complementary angles because their sum is 90.

Notice that they form a right angle when placed together.

Complementary Angles are two angles with a sum of 90 degrees.

These two angles are complementary angles because their sum is 90.

Although they aren't placed together, they can still be complementary.

17 What is the measure of A?

50A

18

57575757

57

57 57

What is the measure of A?

A

19 Tell whether the two angles are complementary?

Angle 1 = 63 degreesAngle 2 = 27 degrees

A Yes

B No

20 Tell whether the angles are complementary.

Angle 1 = 146 degrees Angle 2 = 44 degrees

A Yes

B No

Supplementary Angles are two angles with a sum of 180 degrees.

These two angles are supplementary angles because their sum is 180.

Notice that they form a straight angle when placed together.

Supplementary Angles are two angles with a sum of 180 degrees.

These two angles are supplementary angles because their sum is 180.

Although they aren't placed together, they can still be supplementary.

21 What is the measurement of angle A?

Angle A 125o

22 What is the measurement of angle A?

Angle A 40o

23 Tell whether the two angles are supplementary.

Angle 1 = 115 degrees Angle 2 = 65 degrees

A Yes

B No

24 Find the supplement of 51

25 Find the complement of 51

26 Find the complement of 27

27 Find the supplement of 27

28 Find the supplement of 102

29 Find the complement of 102