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OpenStudy (anonymous):
O is the center of the regular pentagon ABCDE. How many degrees are there in angle OAB? (A) 36 (B) 54 (C) 72 (D) 108 (E) 126
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OpenStudy (anonymous):
There are 5 sides, each side has a corresponding angle. All the angles are the same size. \[ 5x=360^\circ \]
OpenStudy (anonymous):
Isn't the total degrees 540?
OpenStudy (anonymous):
O is surrounded by 5 angles, then angle for a full rotation is 360
OpenStudy (anonymous):
oh...
OpenStudy (anonymous):
72?
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OpenStudy (anonymous):
Yes
OpenStudy (anonymous):
yay! Thanks
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