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Find the perimeter of a circle whose area is 154 cm

User Brock
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2 Answers

3 votes
The formula for the area of a circle is given by:
A = πr^2, where r is the radius of the circle.

If the area of the circle is 154 cm^2, we can find the radius by rearranging the formula and solving for r:
r^2 = A/π = 154/π
r = √(154/π)

The formula for the perimeter, or circumference, of a circle is given by:
C = 2πr

Substituting the value of r from above, we get:
C = 2π√(154/π) = 2π√(154/π) cm

So, the perimeter of the circle with an area of 154 cm^2 is approximately 23.22 cm.
User Lucas Pottersky
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7.4k points
3 votes

Answer:

Below

Explanation:

Area = pi r^2

so r = sqrt ( area / pi) = sqrt ( 154/pi) = 7 cm so diameter = 14 cm

Perimeter ( also called circumference ) = pi * d

= pi * 14 = 44 cm

User Delfino
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8.0k points