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Triangle Sum Properties

Triangle Sum Properties

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• 1. 4.1&#xA0;Triangle&#xA0;Sum&#xA0;Properties October&#xA0;14,&#xA0;2013 Chapter 4: Congruent Triangles Activity: Find the sum of the measures of the angles. Materials: Paper, Ruler &amp; Scissors Draw 2 different sized triangles with one of the sides extended. Label the 4 angles. Cut out the triangles. A W B C D X Y Z 1st Triangle: Tear off the three corners. Place them next to each other on the extended line. Make a conjecture about the sum of the measures of interior &lt;s 2nd Triangle: Tear off corners that aren't next to the exterior &lt;s. Use them to fill the exterior &lt;. Make a conjecture about the relationship between the measure of an exterior &lt; and the nonadjacent interior &lt;s. Conclusions: The sum of the measures of the interior &lt;s of a triangle = 180. The measure of the exterior angle of a triangle the sum of the 2 nonadjacent interior &lt;s. Oct&#xA0;15&#xAD;1:24&#xA0;PM HW&#xA0;pg.&#xA0;221&#xA0;#8&#xAD;18&#xA0;evens,&#xA0;21&#xAD;26,&#xA0;32&#xA0;&amp;&#xA0;36 1