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MATH / Triangle ABC is isosceles, with AB=AC and altitude AM=11. Suppose that there is a point D on (AM)¯ with AD=10 and ∠BDC=3∠BAC. Find the perimeter of triangle ABC. [asy] unitsize(0.4… · Discussion

Discussing Triangle ABC is isosceles, with AB=AC and altitude AM=11. Suppose that there is a point D on (AM)¯ with AD=10 and ∠BDC=3∠BAC. Find the perimeter of triangle ABC. [asy] unitsize(0.4… · MATH

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