The Missing Angle: Triangles

Updated on May 18, 2010
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To be considered a triangle, the three angles in a three-sided shape must add up to 180 degrees. Given this basic rule, can your child figure out the measurements of these missing angles? All this activity requires is some basic arithmetic, but it will go a long way in building his geometry foundation.

Fourth Grade Geometry Worksheets: The Missing Angle: Triangles
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