#How do I prove triangle BDM congruent to DFM and DCN congruent to DFN?
8 messages · Page 1 of 1 (latest)
8 messages · Page 1 of 1 (latest)
In the figure above, ABC is an equilateral triangle, BD = CD, and ∠BDC = 120. M is on AB, and N is on AC, so that ∠MDN = 60. If side length of ΔABC is 3, find the perimeter of ΔAMN.
I need to prove this using only triangle congruency theorems.
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Pfötchen
Just show that D is the center of escribed circle of MAN