Answer:
ΔMDA ≅ ΔMBC by ASA
Explanation:
∠DMA ≅ ∠BMC
MD ≅ MB
∠MDA ≅ ∠MBC
Two angles are congruent and the sides in between the congruent angles are equal. So, the two triangles are congruent by Angle Side Angle congruency.
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