Angles and Polygons

1
Angles and Polygons
COURSE 3 LESSON 8-6
Find the sum of the measures of the interior
angles of an octagon.
An octagon has 8 sides.
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2
Angles and Polygons
COURSE 3 LESSON 8-6
Find the missing angle measure in the hexagon.
Step 1 Find the sum of the measures of the
interior angles of a hexagon.
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3
Angles and Polygons
COURSE 3 LESSON 8-6
(continued)
Step 2 Write an equation.
Let x the missing angle measure.
The missing angle measure is 122º.
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4
Angles and Polygons
COURSE 3 LESSON 8-6
A design on a tile is in the shape of a regular
nonagon. Find the measure of each angle.
Find the sum of the measures of the interior
angles of the nonagon.
Each angle of a regular nonagon has a measure of
140.
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5
Angles and Polygons
COURSE 3 LESSON 8-6
1. Find the sum of the measures of the interior
angles of a polygon having 17
sides. 2. Five angles of a hexagon measure
128, 190, 112, 154, and 90. Find the
measure of the missing angle. 3. Find the
measure of each angle of a regular polygon having
24 sides.
2,700
46
165
8-6