How Do You Work Out The Surface Area Of A Circle?

5 Answers

Anonymous Profile
Anonymous answered
You do do pi r squared times 2 + pi times height and diameter
John Hall Profile
John Hall answered
The area of a circle is simply PI x R squared,

Where PI is the value 22/7 and R is the radius of the circle.

Hence the surface area of a circle measuring 30 cm in diameter would be 22/7 x 15 x 15 = 707.14 cm2
Kyoko Katayama Profile
Kyoko Katayama answered
Multiply the radius by itself and then multiply that result by pi.  That gives the area of the circle.

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