In convex quadrilateral $ABCD$.The two sides $BC=CD$. Also $ 2\angle A+\angle C=180^\circ $
And $M$ is the midpoint for $BD$. How to prove that $\angle MAD= \angle BAC$.
In convex quadrilateral $ABCD$.The two sides $BC=CD$. Also $ 2\angle A+\angle C=180^\circ $
And $M$ is the midpoint for $BD$. How to prove that $\angle MAD= \angle BAC$.