Similar Polygons

1
Similar Polygons

• Glenn C. Jones Middle School

2
Definitions

• Polygon a simple, closed figure in a plane that
  has three or more sides.
• Similar Polygons polygons that have the same
  shape but are different sizes

3
Polygons

• 3 sides- Triangle
• 4 sides- Quadrilateral
• 5 sides- Pentagon
• 6 sides- Hexagon
• 7 sides- Heptagon
• 8 sides- Octagon
• 9 sides- Nonagon
• 10 sides- Decagon

4
Important!

• Two polygons are similar if their corresponding
  angles are congruent and their corresponding
  sides are in proportion.

5
Example 1

• Tell whether each pair of polygons is similar.

6
Example 2

• Tell whether each pair of polygons is similar.

7
Example 3

• Tell whether each pair of polygons is similar.

8
Example 4

• Use proportions to solve for x.

9
Example 5

• Use proportions to solve for x.

10
Example 6

• Use proportions to solve for x.

11
Example 7