Online Geometry theorems, problems, solutions, and related topics.
Geometry Problem. Post your solution in the comments box below.Level: Mathematics Education, High School, Honors Geometry, College.Click the figure below to see the complete problem 875.
Join BC. Then AC = BC = BE. β = α + ∠BEA= α + ∠BCE= α + α + ∠CBA= α + α + α= 3α
Draw a line from point B to C. Triangle ABC is an isosceles triangle, AC = BC, then ∠CAB = ∠CBA.∠BCE = 2α.in triangle ABE if ∠AEB is x then ∠EBF is exterior angle, then β = α + x∠BCE = ∠AEB = 2α then β = α + 2α = 3α (q.e.d)