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Mathematics 9 Online
OpenStudy (anonymous):

Angle DCA is 120°. What percent of the circle's area does this section represent?

OpenStudy (zale101):

this is simple, draw a circle, label 120 degrees "DCA" and count how many sections are there.

OpenStudy (anonymous):

3

OpenStudy (zale101):

u can try to use this formula 1/6 x pi*r^2

OpenStudy (anonymous):

i don't understand. i mean how and what u substitute

OpenStudy (wolf1728):

How a bout a diagram? I'm assuming Angle DCA is a central angle correct?

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