Question

given that area of cicle is 616mm2 . find
1) diameter 2) radius 3) circumference

Answer 1

Given - Area of circle - 616 mm².

Find - 1) diameter 2) radius 3) circumference of circle with given area.

Solution - Area of circle in the terms of diameter is calculated by the formula - π(d/2)². In the formula, d stands for diameter.

Keeping the values in formula-

616/π = (d/2)²

d/2 = ✓(196.1)

d/2 = 14

d = 28 mm

Radius = Diameter/2

Radius = 28/2 = 14 mm

Circumference = 2πr

Circumference = 2*π*14

Circumference = 88 mm

Hence, the diameter of circle is 28 mm, radius of circle is 14 mm and circumference of circle is 88 mm.