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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 depicts an isosceles triangle ABC, where AB = BC, angle B measures 20 degrees, point D lies on BC, and point E lies on AB. Given that angle CAD measures 25 degrees and angle ACE measures 65 degrees, determine the measure of angle CED. Please note that an 'elegant' solution should employ elementary geometry principles without resorting to trigonometry.
  

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

Equal angles rise,
In isosceles's grace,
Symmetry finds peace.

Poster of: Geometry Problem 1038: Sketching, Typography using iPad Apps.

Poster of Geometry Problem 1038: Isosceles Triangle, iPad Apps

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Typography of problem 1038
Art of problem 1038.

Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 10 Problems | Problems Art Gallery Art | 1031-1040 | Triangle | Isosceles Triangle | Isosceles Triangle 80-20-80 | Email | by Antonio Gutierrez
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Last updated: May 3, 2019