Complementary Angles : Angles whose measure adds up to 90 Degrees

Complementary angles are angles whose sum is 90°

Angles a and B on the left are complementary because the two angles add up to 90°.
(By the way,complementary angles do not necessarilly have to be adjacent angles. In other words, complementary angles do not have to be side-by-side. The only requirement to be complementary angles is adding up to 90°.)

Practice Problems

What is the m

a in the picture on the left?
Answer

What is m

a in the picture on the left?
Answer

What is m

x in the picture on the left?
Step 1

1 = 2x+1 &

2 =3x+4
What is the value of x?
Value of X

What is the measure of the two complementary angles?
Answer

Complementary Angles

Formula, Examples, diagrams and practice problems