Sum of Interior Angles of a Triangle

The following construction steps will help the students to understand why "The Sum of Interior Angles of a Triangle" is equal to 180 degrees.

rcolorado — 2. maaliskuuta 2014 - 12.57

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Johdetut materiaalit: Sum of Interior Angles of a Triangle
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Luonut Beth Cavanagh; Sum of Interior Angles of a Triangle
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