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Mathematics

Grade9

Easy

Question

What is the area of the following circle?

78.5
56.5
43.89
68.5

hint Hint:

$A equals pi r to the power of 2 end exponent$

The correct answer is: 78.5

Given d = 10 ;
r = $fraction numerator d over denominator 2 end fraction$ = $fraction numerator 10 over denominator 2 end fraction$ = 5
$A equals pi r to the power of 2 end exponent$ = 3.14×5×5 = 78.5

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