why the sum of the opposite angles of an isosceles trapezium 180 degree
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- because two opposite angle =180degrees
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for example:
angle 80degrees+" "100 degrees =180
degrees
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The sum of opposite angles in Irene's isosceles trapezoid is180 degrees. ... She also knows that AB is parallel to CD, which makes the pairs of angles A and D and B and C interior angles on the same side of the transversal. This means, these pairs are supplementary or their sum is 180 degrees.
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