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°. In the given figure, the right - angle symbol indicates that the two angles 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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