Question

the measure of an angle is 20.9°. what is the measure of its supple

Explanation:

Step1: Recall supplementary angle definition

Supplementary angles sum to \(180^\circ\). Let the angle be \(A = 20.9^\circ\), and its supplement be \(B\). Then \(A + B = 180^\circ\).

Step2: Solve for the supplement

Rearrange the formula: \(B = 180^\circ - A\). Substitute \(A = 20.9^\circ\): \(B = 180 - 20.9 = 159.1^\circ\).

Answer:

\(159.1\)