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What is the area of each circle. Use 22/7 for pi. 1. r = 6 ft 2. d = 22 in.
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High School Teacher
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1. First write down the formula for area of a circle:
A = pi * r ^2
Then substitute what you know:
A = (22/7) x 6 x 6 and multiply
Remember to always put area in square measure. So..
A = 113.14 square feet
2. Write down the formula:
A = pi * r^2
3. Substitute what you know:
A = (22/7) x 11 x 11
(Remember that d/2 = r)
4. Multiply and put the answer in square inches:
380.29 square inches
Posted by jlischke on March 1, 2009 at 12:14 PM (Answer #1)
The formula for circle area is:
1. r= 6ft
A= 22/7*6^2=22/7*36=1358 inch^2
2. We know that d=2r, so r=d/2, r=22/2=11inch
A=pi*r^2=22/7*11^2= (22*121)/7=2662/7 inch^2
Posted by giorgiana1976 on February 17, 2009 at 5:22 PM (Answer #2)
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