Math

In a circle whose center is O, arc AB contains 100°. Find the number of degrees in angle ABO.

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asked by Fiyi
  1. ABO is an isosceles triangle ... AO and BO are radii of the circle
    ... so angles A and B are equal ... A = B

    central angle O equals the arc AB ... O = 100º

    A + B + O = 180º

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    posted by scott

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