1.7. Complementary Angles http://www.ck12.org
8 r+ 9 ◦+ 7 r+ 5 ◦= 90 ◦
15 r+ 14 ◦= 90 ◦
15 r= 76 ◦
r= 5. 067 ◦However, this is not what the question asks for. You need to plugrback into each expression to find each angle.
m^6 GHI= 8 ( 5 ◦)+ 9 ◦= 49 ◦
m^6 JKL= 7 ( 5 ◦)+ 6 ◦= 41 ◦Example C
Name one pair of complementary angles in the diagram below.
One example is^6 INJand^6 JNK.
Watch this video for help with the Examples above.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter1ComplementaryAnglesB
Vocabulary
Two angles arecomplementarywhen they add up to 90◦.
Guided Practice
Find the measure of an angle that is complementary to^6 ABCifm^6 ABCis
1. 45◦
2. 82◦
3. 19◦
4.z◦Answers:
- 45◦
- 8◦
- 71◦
- 90−z◦