Angle Relationships

Objective: Compute angle complements and supplements (A2b).

Two angles are complementary if their measures add up to 90º.

Examples:

(1.) Two 45º angles are complementary since their measures sum to 90º.

(2.) Angle S, with measure, mS = 80º, is complementary with T if m T = 10º.

Examples:

(1.) Two right angles are supplementary since their measures add up to 180º.

(2.) Angle S, with measure, m

S = 135º, is supplementary with T if m

T = 45º.

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