The Mittenpunkt!

Geometry Level 5

Lester's Circle is a triangle circle defined by four triangle centers, the circumcenter, O O , the nine-point circle center, N N , and the first and second Fermat points F 1 F_1 and F 2 F_2 , all of which lie on the circumference of Lester's Circle. In A B C \triangle ABC , the Mittenpunkt , M M , also lies on Lester's circle. If the perimeter of A B C \triangle ABC is 56 and the area is 96, what is the radius, L M LM , of Lester's circle for A B C \triangle ABC ?


The answer is 6.3100.

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