Lines and Angles
- An angle is made when two lines or line segments meet. For example:
- When the sum of the measures of two angles is 90°, the angles are called complementary angles.
Here, ∠AOB and ∠PQR are complementary as (∠AOB + ∠PQR) = 75° + 15° = 90°.
- When the sum of the measures of two angles is 180°, the angles are called supplementary angles.
Here, ∠ABC and ∠PQR are supplementary as (∠ABC + ∠PQR) = 110° + 70° = 180°.
- A pair of angles are…
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