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How do you find the radius of a circle given its area of a circle is 616cm^2?

Answer 1

Avery Alexander

#r=14cm#

Area of a circle#=pir^2#

#:.pir^2=616cm^2# given

#:.r^2=616/pi#

#:.r^2=616/3.141592654#

#:.r^2=196.0788899#

#:.r=sqrt196.0788899#

#:.r=14.00281721cm#

#:.r=14cm# to the nearest cm

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Answer 2

Jace Anderson

To find the radius of a circle given its area, you can use the formula for the area of a circle, which is ( A = \pi r^2 ), where ( A ) is the area and ( r ) is the radius. Rearrange the formula to solve for ( r ): ( r = \sqrt{\frac{A}{\pi}} ). Plug in the given area ( A = 616 ) cm² and calculate the radius.

( r = \sqrt{\frac{616}{\pi}} )

( r \approx \sqrt{\frac{616}{3.14}} )

( r \approx \sqrt{196.178 \text{ cm}^2} )

( r \approx 14 \text{ cm} ) (approximately)

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.