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Online Math: Geometry Problem 1038: Isosceles Triangle, Angle, 80, 20, 25, 65 Degrees. Level: School, College.

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The figure below shows an isosceles triangle ABC with AB = BC, angle B = 20 degrees, D on BC and E on AB. If angle CAD = 25 degrees and angle ACE = 65 degrees, find the measure of angle CED.
An "elegant" solution must use only elementary geometry, no trigonometry.
This entry contributed by email from Anonymous.
  

Geometry Problem 1038: Isosceles Triangle, Angle, 80, 20, 25, 65 Degrees

 


 

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Last updated: Sep 19, 2014