INT2 8.2.1: 8-24 Student eTools (Desmos)

Use these eTools to help students confirm their conjectures about the exterior angles of various polygons.

With these eTools, students will notice that the sum of the exterior angles of a convex polygon will be 360° regardless of whether or not the polygon is regular.

8-24f1: Exterior Angles - Triangles

1. Click the colored points and drag to change the triangle.

2. Click the BLUE point (slider) and drag horizontally to change the scale of exterior angles.

8-24f2: Exterior Angles - Quadrilaterals

1. Click the colored points and drag to change the quadrilateral.

2. Click the BLUE point (slider) and drag horizontally to change the scale of exterior angles.

8-24f3: Exterior Angles - Pentagons

1. Click the colored points and drag to change the pentagon.

2. Click the BLUE point (slider) and drag horizontally to change the scale of exterior angles.

8-24f4: Exterior Angles - Hexagons

1. Click the colored points and drag to change the hexagon.

2. Click the BLUE point (slider) and drag horizontally to change the scale of exterior angles.