How do you find the circumference and the area of a circle with diameter 2ft?

1 Answer
Oct 14, 2015

Answer:

Area = # pi " ft"^2 -> # approx 3.14 square feet
circumference = #2pi# ft -> approx. 6.24 feet (# 6" feet " 3 3/8 "inches"#)

Explanation:

Let the radius of a circle be r, then:

Area is #pi r^2 -> pi times (1 " foot")^2 = pi#
Circumference is # 2 pi r -> 2 times pi times 1 "foot" = 2 pi#

The number #pi# converted to feet and inches is:
3 feet + approx. # 1 11/16 # inches

So using decimals:
area is approx.: #3.14# square feet
Circumference is approx.: #6.24# feet