Question

the measure of an angle is 123°. what is the measure of its supplementary angle?

Explanation:

Step1: Recall the definition of supplementary angles

Supplementary angles add up to \(180^{\circ}\). Let the supplementary angle be \(x\).

Step2: Set up the equation

\(123^{\circ}+x = 180^{\circ}\)

Step3: Solve for \(x\)

\(x=180^{\circ}- 123^{\circ}\)
\(x = 57^{\circ}\)

Answer:

\(57\)