Page 265 - NUMINO_WB_6B
P. 265
125_G6U27_WB˜ ˙—» ¿º 2011.6.23 3:44 PM ˘ ` 19
125-P3-1
Use of the Angles of a Polygon
Find the measure of an interior angle of an equilateral heptagon.
Step 1. Divide an equilateral heptagon into triangles by drawing diagonals from
one point. How many triangles are made?
Step 2. The sum of the interior angles of triangle BCD is 180. What is the sum of
the interior angles of a heptagon?
Step 3. What is the measure of one of the interior angles of an equilateral
heptagon?
125-P3-1
Use of the Angles of a Polygon
Find the measure of an interior angle of an equilateral heptagon.
Step 1. Divide an equilateral heptagon into triangles by drawing diagonals from
one point. How many triangles are made?
Step 2. The sum of the interior angles of triangle BCD is 180. What is the sum of
the interior angles of a heptagon?
Step 3. What is the measure of one of the interior angles of an equilateral
heptagon?
