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# Toothpick Exploration Leading to Angle Sums of Polygons

Unit 5: Polygons and Congruent Triangle Proofs
Lesson 5 of 6

## Big Idea: How many toothpicks does it take? Students explore and develop their own formulas - leading to their discovery of the formula for the interior angle sums of polygons.

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Standards:
Subject(s):
Math, Geometry, octagon, quadrilateral, polygons (Determining Measurements), Polygon, hexagon, Pentagon, heptagon, nonagon, decagon
90 minutes

### Beth Menzie

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