Equilateral triangle v3

Calculate the content of the colored gray part. Equilateral triangle has side length 8 cm. Arc centers are the vertices of a triangle.

Correct result:

S =  2.5801 cm2

Solution:

a=8 cm r=a/2=8/2=4 cm A=60360=160.1667 S1=3/4 a2=3/4 82=16 3 cm227.7128 cm2 S2=π r2 A=3.1416 42 0.16678.3776 cm2  S=S13 S2=27.71283 8.3776=2.5801 cm2



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