I've tried and i have no clue how to do this.

This isn't to diffuclt. So, to the formula for the area of a circle is , or instead of r, you can put D, which is r times 2

The diameteris 2.5, so, the answer would be

pi times 2.5, where pie = 3.14

So, the answer is 2.5 * 3.14 = 7.85 or 7.9

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