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125_G6U27_WB˜ ˙—» ¿º 2011.6.23 3:44 PM ˘ ` 9
125-B5-1
The Sum of the Interior Angles of a Polygon
1. Draw diagonals from one point of a polygon. Count the number of diagonals and
triangles.
Example
Diagonals:
Triangles:
a. b. c.
Diagonals: Diagonals: Diagonals:
Triangles: Triangles: Triangles:
125-B5-1
The Sum of the Interior Angles of a Polygon
1. Draw diagonals from one point of a polygon. Count the number of diagonals and
triangles.
Example
Diagonals:
Triangles:
a. b. c.
Diagonals: Diagonals: Diagonals:
Triangles: Triangles: Triangles:
