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Mathematics 20 Online
OpenStudy (anonymous):

what is the formula for finding the area of a sector of a circle with radius r?

OpenStudy (anonymous):

here is a link that shows you how to solve you question http://www.purplemath.com/modules/sectors.htm

OpenStudy (cwrw238):

in terms of angle theta at center (in radians ) it is 1/2 r^2 theta

OpenStudy (cwrw238):

r = radius

OpenStudy (anonymous):

isnt it just (degree measure of sector/360)*3.14r squared?

OpenStudy (anonymous):

my link will help you understand your question

OpenStudy (anonymous):

well my choices are (degree measure of sector/360)*3.14r (degree measure of sector/360)*2*3.14r (degree measure of sector/360)*3.14r squared (degree measure of sector/360)*3.14

OpenStudy (cwrw238):

yes you can also define it terms of degrees and pi

OpenStudy (anonymous):

so which one is right?

OpenStudy (cwrw238):

correct is (measure of sector / 360) *3.14 * r^2

OpenStudy (cwrw238):

your 3rd option

OpenStudy (anonymous):

okayy thank you!

OpenStudy (cwrw238):

yw

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