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Complementary Angle Calculator
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 Two angles are complementary if the sum of their measures is 90. If angle A is complementary to angle B, then m$\angle$A + m$\angle$B = 90, and each angle is called the complement of the other angle.Complementary Angle Calculator is used to find the sum of two angles. Both angles should be 90 degrees.

## Steps for Complementary Angle

Step 1 :

In geometry a complementary angle = $\angle a$ + $\angle b$ = 90 degree.

Step 2 :

We use this following rule to know $\angle a$ and $\angle b$

$\angle a$ = 90 - $\angle b$.

$\angle b$ = 90 - $\angle a$

## Example Problem on Complementary Angle Calculator

1. ### If the angle one is 30, find the angle 2 if the two angles are complementary for each other.

Step 1 :

Let the angle 2 be x

angle 1 = 30

Step 2 :

If the two angles are complementary for each other

Then

x + 30 = 90

x = 60

2. ### If the angle 1 is 40o. Determine the measure of the complement of angle A.

Step 1 :

Let the angle 2 be x

angle 1 = 40o

Step 2 :

If the two angles are complementary for each other

Then

x + 40 = 90

x = 50o