If sum of two angles is 90°, they are complementary

For example 30° + 60° = 90°

Since sum of both angles is 90°

So, they are complementary

Are these angles complementary? 35° + 65° = 100°

≠ 90°

Since sum of both angles is not 90°

So, they are not complementary

Are these angles complementary? 45° + 45° = 90°

Since sum of both angle is 90°

So, they are complementary

Are these angles complementary? 70° + 20° = 90°

Since sum of both angle is 90°

So, they are complementary

Are these angles complementary? 75° + 25° = 100°

≠ 90°

Since sum of both angles is not 90°

So, they are not complementary

Are these angles complementary? 48° + 52° = 100°

≠ 90°

Since sum of both angles is not 90°

So, they are not complementary

Are these angles complementary? 35° + 55° = 90°

Since sum of both angles is 90°

So, they are complementary

1. Chapter 5 Class 7 Lines and Angles
2. Concept wise
3. Supplementary and complementary angles

Supplementary and complementary angles
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