PERT Practice Test 2026 – Comprehensive Study Guide for Postsecondary Education Readiness Success!

Question: 1 / 400

In a right triangle, if one angle measures 30 degrees, what is the measure of the other non-right angle?

50 degrees

60 degrees

In a right triangle, the sum of all angles is always 180 degrees, and since one angle is a right angle, it measures 90 degrees. Therefore, the remaining two angles must sum to 90 degrees because:

180 degrees (total) - 90 degrees (right angle) = 90 degrees (sum of the other two angles).

Given that one of the angles measures 30 degrees, to find the measure of the other non-right angle, you would calculate:

90 degrees (sum of the two non-right angles) - 30 degrees (the known angle) = 60 degrees.

This shows that the measure of the other non-right angle is indeed 60 degrees, confirming that this is the correct answer.

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70 degrees

80 degrees

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