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OpenStudy (anonymous):
Find the area of a sector with a central angle of 100° and a diameter of 5.6 cm. Round to the nearest tenth. A) 27.4 cm2 B) 3.1 cm2 C) 1.2 cm2 D) 6.8 cm2 I must be doing something wrong...
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OpenStudy (amistre64):
teh sector is the pie shape of the arc left over?
OpenStudy (amistre64):
make sure your calculator is set to degree for the 100
OpenStudy (amistre64):
and then its just angle*radius/2
OpenStudy (amistre64):
well; i spose youneed to swap degrees into radians ...
OpenStudy (amistre64):
100 needs a pi soo 100pi ----- = radian measure 180
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OpenStudy (amistre64):
area = angle r^2/2
OpenStudy (amistre64):
I get 27.366...
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