Question

mensuration formulas​

Answer 1

Step-by-step explanation:

Area of a circle = πr2= (πd2)/4.

Circumference of a circle = 2πr = πd.

Circumference of a semicircle = πr.

Perimeter of the semicircle = (πr+d)

Area of semicircle =(πr2)/2.

Length of an arc = (2πrθ)/360, where θ is the central angle in degrees.

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