SOLUTION: Find the radius of a circle that has an area of 78.75 cm2 (squared). Use 3.14 for pi. Round to the nearest tenth.
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Question 1086173: Find the radius of a circle that has an area of 78.75 cm2 (squared). Use 3.14 for pi. Round to the nearest tenth.
Found 2 solutions by jim_thompson5910, MathLover1:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Area of circle = pi*(radius)^2
A = 3.14*(r)^2
78.75 = 3.14*(r)^2
78.75/3.14 = [3.14*(r)^2]/3.14
25.079617834395 = r^2
r^2 = 25.079617834395
sqrt(r^2) = sqrt(25.079617834395)
r = 5.00795545451384
r = 5.0 centimeters
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
the radius of a circle that has an area of
use formula for area of a circle:
.........substitute area and
to the nearest tenth will be
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