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Mathematics 8 Online
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

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?

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

yay! Thanks

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