Given: triangle ABC with D on AC and E on BC,
angle CAE = 10°,
angle BAE = 70°,
angle CBD = 20°, and
angle ABD = 60°.
Find angle AED using only elementary geometry (no sines, cosines , or any other trigonometry.)
Construct point F on CB such that angle DAF = 20
Construct segments AF and DF
AF and BD intersect at G
Construct segment CG
No other point or segments are needed

Posted by Jer
on 20161119 08:35:51 