Wonder in equilateral triangle

Geometry Level pending

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In the figure two equilateral triangle are shown with common vertex and and another vertex of the second triangle lies on a sides of first triangle. Find the angle marked yellow?

30 60 80 Can't be found

Swaroop Dora by Swaroop Dora , 22, India

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2 solutions

Swaroop Dora
Jan 20, 2020

Graphical Solution Graphical Solution

3 Helpful 0 Interesting 3 Brilliant 0 Confused

Nice solution, how did you do the animation part? Thank you in advance.

Hana Wehbi - 1 year, 4 months ago

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I used geogebra.

Swaroop Dora - 1 year, 4 months ago

As ∠ A D B = ∠ A C B = 60 ° \angle ADB=\angle ACB=60\degree , A , B , C , D A,B,C,D concyclic, then ∠ A B D = ∠ A C D = 60 ° \angle ABD=\angle ACD=60\degree

2 Helpful 1 Interesting 2 Brilliant 0 Confused

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