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kompoz [17]
3 years ago
7

Will give brainliest answer

Mathematics
2 answers:
lidiya [134]3 years ago
7 0
The square root of 10 because

sqrt(10) ^2 * 3.14 =

10*3.14 = 31.4
dmitriy555 [2]3 years ago
7 0

Answer:

78.4 square units

Step-by-step explanation:

First we will find the radius of the circle by using circumference formula of circle.

c = 2\pi \: r \\ 31.4 =  2 \times 3.14 \times r \\  \\ r =  \frac{31.4}{2 \times 3.14}  \\  \\ r =  \frac{3140}{2 \times 314}  \\  \\ r =  \frac{10}{2}  \\  \\ r = 5 \: units \\  \\ area \: of \: circle = \pi {r}^{2}  \\  = 3.14 \times  {5}^{2}  \\  = 3.14 \times 25 \\  = 78.5 \:  {units}^{2}  \\

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