Complementary Angle Calculator

Discover the complementary angle with ease!

Enter an angle in degrees to calculate its complementary angle. Complementary angles are two angles that add up to 90°.

Enter Angle (°):

Complementary Angle (°):

Understanding Complementary Angles

In geometry, two angles are complementary if their sum is exactly 90 degrees. If you have an angle, its complementary angle is what you need to add to it to reach a right angle (90°).

Formula: If ∠A is an angle, its complementary angle ∠B can be found using the formula:

∠B = 90° - ∠A

Example: If you have an angle of 30°, its complementary angle is 90° - 30° = 60°. Therefore, 30° and 60° are complementary angles.

This tool helps you quickly find the complementary angle for any given angle, making it useful for students, educators, and anyone working with geometry.