Question

Define supplementary angles.

Answer 1

Supplementary Angles: Two angles, the sum of whose measures is180° , are called supplementaryangles.

Thus, angles ∠BAC and ∠DAC are supplementary angles, if

x + y = 180°

Example 1:

Angles of measure 50°and130°are supplementary angles, because

50° +130°=180°

Example 2:

Angles of measure 60°and120°are supplementary angles, because

60° +120° =180°