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.
