Geometry

Question Analysis

The main focus is to leverage the property of an altitude (forming a right - angle with the opposite side) to determine the value of by formulating an equation based on the provided angle expression.

 

Key Concept Explanation

An altitude of a triangle is a line segment extending from a vertex and perpendicular to the opposite side. By the nature of perpendicularity, the angle between an altitude and the opposite side measures .

 

Step - by - Step Solution

1. Recall the property of an altitude:

Since is an altitude of , .

2. Set up the equation:

Given that , we establish the equation

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