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January 28, 2015

January 28, 2015

Posted by **denise** on Tuesday, February 26, 2013 at 11:34am.

- geometry -
**Steve**, Tuesday, February 26, 2013 at 11:57amdraw a line through a vertex parallel to the opposite base.

The other two sides are transversals between the two parallel lines.

Since alternate interior angles are equal, and the 3 angles formed at the vertex add up to a straight angle ...

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