Question

A circle's circumference is approximately 76 cm. Estimate the radius, diameter, and area of the circle. Use 3. 14 to represent

Answer 1

Radius = 12.10 cm

Diameter = 24.20 cm

Area = 459.73 cm²

Explanation:

Circumference of a circle is given by the formula

`C = 2\pi r` where r = radius

Given C = 76 cm, π = 3.14,
76 = 2 · 3.14 · r

76 = 6.28r

r = 76/6.28

or

r = 12.10 cm

Diameter = 2 x radius = 2 x 12.10 = 24.20

Area = π · r²

= 3.14 · (12.10)²

= 459.73 cm²