Problem Solving (PS) | AD = BD = CD. If angle BAD = 50°, what is angle BCA?

Assuming that there's a circle subscribing the traingle ABC with center D and radious DA = DC= DB.

AC must be a diagonal hence, Angle ABC is a 90• and Traingle ABC is a right angled traingle. Now it's given that angle BAD is 50, so we can calculate Angle BCA (180-90-50 = 40•)

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