## Relate the sum of the angles in a triangle to the sum of the angles in polygons. 0606.4.2

## Links verified on 7/14/2014

- Angle Sums - Examine the angles in a triangle, quadrilateral, pentagon, hexagon, heptagon or octagon. Can you find a relationship between the number of sides and the sum of the interior angles.
- Measuring Angles - Practice lining up and reading a protractor while you measure a set of angles in a fun learning activity
or- Pythagorean Explorer - Students find the length of a side of a right triangle by using the Pythagorean Theorem, and then check their answers.
- The Pythagorean Theorem - five multiple choice questions
- Squaring the Triangle - Students learn about how the Pythagorean Theorem works, through investigating the standard geometric proof. Parameters: Sizes of the legs of the triangle.
- Sum of Angles in Polygons - IXL fill-in-the-blank quiz
- Sum of Angles in Polygons - A polygon is a closed plane (flat) figure with straight sides. There is a way to measure the sum of the interior angles that depends upon the number of sides (which is the same as the number of angles). We show this and also investigate the exterior angles. Two practice questions are at the bottom of this page.

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