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3 years ago

If the area of a circle is found using A=πr2, find r if the area is 25in2 and using pi equals 3.14

Mathematics

1 answer:

Olegator [25]3 years ago

5 0

Answer:

r = 2.8 in ( to 1 dec. place )

Step-by-step explanation:

substitute the given values into the formula

25 = 3.14r² ( divide both sides by 3.14 )

r² = $\frac{25}{3.14}$ ( take the square root of both sides )

r = $\sqrt{\frac{25}{3.14} }$ ≈ 2.8 in

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