MathDB
Triangle Problem

Source: 1988 National High School Mathematics League, Exam One, Problem 8

February 25, 2020

Problem Statement

In △ABC\triangle ABC, ∠A=α\angle A=\alpha, CD,BECD,BE are height on sides AB,ACAB,AC. Then∣DE∣∣BC∣=\frac{|DE|}{|BC|}=________.
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