A circle has a radius of 7ft. What is its circumference?Use 3.14 for it, and do not round your answer. Be sure to include the correct unit in your answer.7ft

Question

asked Oct 16, 2023 33.6k views

1 Answer

Soflare · Answer 1 · 2023-10-21T17:15:03+0000

The circumference of a circle with radius r is given by:

$C=2\pi\cdot r$

The area of a circle with raidus r is given by:

$A=\pi\cdot r^2$

Then for a cirlce of radius 7ft we have a circumference of:

$C=2\pi\cdot7ft=2\cdot3.14\cdot7ft=43.96ft$

And an area of:

$A=\pi\cdot(7ft)^2=3.14\cdot49ft^2=153.86ft^2$

Then the answers are:

Circumference: 43.96ft

Area: 153.86ft²