교과서 질문
Find the measure of each marked angle. See Example 2.
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1. Measuring Angles
Complementary and Supplementary Angles
객관식
If an angle measures , which of the following angles is complementary to it?
A
B
C
D
검증된 단계별 안내1
Recall the definition of complementary angles: two angles are complementary if the sum of their measures is exactly 90 degrees.
Given one angle measures \(1^\circ\), let the complementary angle be \(x^\circ\).
Set up the equation based on the definition: \(1^\circ + x^\circ = 90^\circ\).
Solve for \(x\) by subtracting \(1^\circ\) from both sides: \(x = 90^\circ - 1^\circ\).
Calculate \(x\) to find the complementary angle measure, which will be \(89^\circ\).
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