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OpenStudy (anonymous):
Point C is the center of the circle. What is the measure of arc AB if < ACB is equal to 80 ?
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OpenStudy (anonymous):
OpenStudy (loser66):
=80 as well.
OpenStudy (anonymous):
why does it also = 80?
OpenStudy (loser66):
read it, at the very first section http://www.regentsprep.org/regents/math/geometry/gp15/circleangles.htm
OpenStudy (loser66):
got it?
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OpenStudy (anonymous):
because "A central angle is an angle formed by two intersecting radii such that its vertex is at the center of the circle."?
OpenStudy (mathstudent55):
An arc of a circle has the same measure as the central angle that intercepts it.
OpenStudy (mathstudent55):
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