Math

The exterior angle at the vertex formed by the equal sides of an isoceles triangle is 140 degrees. Which are the measures of the exterior angles at the other verticies

A ) 140 degrees and 80 degrees
B ) 110 degrees and 110 degrees
C ) 40 degrees and 40 degrees
D ) 40 Degrees and 90 degrees

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  1. interior = 180 - 140 = 40

    40 + 2 x = 180
    2x = 140
    x = 70
    180 - x = 110

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  2. Which one is it?

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  3. Is it B?

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