College Math Placement Practice Test 2025 – Comprehensive All-in-One Guide for Exam Success!

Question: 1 / 400

If two angles are complementary and one angle measures 30 degrees, what is the measure of the other angle?

60 degrees

Complementary angles are defined as two angles whose measures add up to 90 degrees. In this scenario, if one angle measures 30 degrees, you can find the measure of the other angle by subtracting the known angle from 90 degrees.

So, you would calculate:

90 degrees - 30 degrees = 60 degrees.

This calculation shows that the measure of the other angle is indeed 60 degrees. Hence, the correct answer reflects this calculation correctly.

The other potential answers do not satisfy the condition of complementary angles, as they either exceed 90 degrees or do not sum with 30 degrees to reach 90.

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90 degrees

45 degrees

30 degrees

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