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mmccarthy in reply to @coventry_eagle

Is that assuming the red area is a quarter circle? As in, the 1/4 * pi * 2^2 term?

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coventry_eagle in reply to @mmccarthy
Got it, blue area is 82/88 of pi.

Red area is pi.

Working on the basis that pi = 22/7.

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mmccarthy in reply to @coventry_eagle

I guess my point was that I don't think the red area is a quarter circle, so can't be calculated by pi*r^2 using 2 as the radius.

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