Question

the measure of an angle is 90.4°. what is the measure of its supplementary angle?

Explanation:

Step1: Recall supplementary angle definition

Supplementary angles sum to \(180^\circ\). Let the supplementary angle be \(x\). So, \(90.4^\circ + x = 180^\circ\).

Step2: Solve for \(x\)

Subtract \(90.4^\circ\) from both sides: \(x = 180^\circ - 90.4^\circ\).
Calculate: \(x = 89.6^\circ\).

Answer:

\(89.6\)