Geometry

Question Analysis

This question involves the concept of complementary angles.

 

Key Concept Explanation

Complementary angles are two angles whose measures add up to 90 degrees. In this figure, the right - angle symbol indicates that the two angles together form a right angle, so they are complementary.

 

Step - by - Step Solution

1. Let the missing angle be .

Since the two angles are complementary, we can set up the equation .

2. Solve for :

Subtract from both sides of the equation. So,

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