Complementary angles

Key Points on Complementary Angles

• Definition: Complementary angles are two angles whose sum equals 90 degrees.

• Examples:

  • Example 1: The addition of 30 degrees and 60 degrees equals 90 degrees, thus they are complementary.

  • Example 2: 45 degrees + 45 degrees = 90 degrees, making them complementary as well.

• Properties:

  • If two angles are complementary, one angle can be found by subtracting the other angle from 90 degrees.

  • Complementary angles do not have to be adjacent; they can be separate angles as long as their sum is 90 degrees.

• Conclusion: Understanding complementary angles is fundamental in geometry and aids in solving various geometric problems.