Question

A.Calculate the circumference of a circle with a radius of 7.5cm The circumference of the circle is Cm because. B. Calculate the area of a circle with a diameter of 8.2 inches (round your answer to the nearest hundredth) The area of the circle is. In because.

Answer 1

Answer: a. 47.13cm ; b. 52.82inches²

Explanation:

A. Circumference of a circle is calculated using the formula = 2πr

where π = 3.142

r = radius = 7.5cm

Circumference = 2πr

= 2 × 3.142 × 7.5

= 47.13cm

Area of a circle =πr²

= 3.142 × 4.1 × 4.1

= 52.82inches²

Note radius = Diameter / 2 = 8.2/2 = 4.1