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120°. If ABC is an isosceles triangle in which the vertical angle A the base BC is trisected in D and E, prove that ADE is an equilateral triangle. CONSTRUCTION: Draw AF and DG Is to BC and AB A 20 30 B E F D

120°. If ABC is an isosceles triangle in which the vertical angle A the base BC is trisected in D and E, prove that ADE is an equilateral triangle. CONSTRUCTION: Draw AF and DG Is to BC and AB A 20 30 B E F D

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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120°. If ABC is an isosceles triangle in which the vertical angle A the base BC is trisected in D and E, prove that ADE is an equilateral triangle. CONSTRUCTION: Draw AF and DG s to BC and AB 20 30 B E D
Transcribed Image Text:120°. If ABC is an isosceles triangle in which the vertical angle A the base BC is trisected in D and E, prove that ADE is an equilateral triangle. CONSTRUCTION: Draw AF and DG s to BC and AB 20 30 B E D
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