So for starters the area of an entire circle has 360º,right?(adsbygoogle = window.adsbygoogle || []).push({});

So we can say that: ##1∏r^2## is ##\equiv## to ##360º##

So by that logic ##0.5∏r^2## is ##\equiv## to ##180º##

And finally ##0.25∏r^2## is ##\equiv## to ##90º##

Divide both sides by 9, and you get : ##0.25∏r^2/9## is ##\equiv## to ##10º##

From that it's much simpler to multiply both sides by some variable.

Simple right?

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# New way to derive sectors of a circle (easy)

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