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
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter5: Similar Triangles
Section5.6: Segments Divided Proportionally
Problem 36E: In right ABC,mB=30. Also, AB=123 and AD bisects BAC. Find BD.
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