Equilateral 81770

Calculate the area of the circle in which the hole is cut in the shape of an equilateral triangle when the diameter of the circle, d=32mm, and the side of the triangle, a=20.8mm.

Correct answer:

S =  616.9091 mm2

Step-by-step explanation:

d=32 mm a=20.8 mm  S1=π (d/2)2=3.1416 (32/2)2804.2477 mm2 S2=43 a2=43 20.82187.3386 mm2  S=S1S2=804.2477187.3386=616.9091 mm2

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