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Math question

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I don't understand how to find the aproximate area of a shaded region

This problem has a big cirlce with 1/4 shadded with a radius of 20 cm.

the answer chocies are

A. 90 cm squared
B. 270 cm squared
C. 314 cm squared
D. 1.256 cm squared

how do I find the answer?

  • Math question -

    take that and divide by four and you get 314.16

  • Math question -

    I don't understand how you got 1256.63

  • Math question -

    I don't either I got 62.8

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