My questions are about Pi and finding the area of a circle with radius.

Question

Question 1.

Find the area of a circle with radius 9in

.Use the value 3.14 for π and do not round your answer.

Be sure to include the correct unit in your answer.

Question 2.

Find the circumference and the area of a circle with diameter 6ft

.Use the value 3.14 for π and do not round your answers. Be sure to include the correct units in your answers.

Answer 1

(1)

A = πr²

You know the radius r and π. Plug in the numbers and get A in square inches.

(2)

C = πd

A = π(d/2)²

You know the diameter d. Plug in the numbers and get circumference in ft, and area in square ft.