Polygons and Perimeters

Wrap-up

Like a home-run hitter who sprints around a baseball diamond, you know your way around perimeter—or any other polygon that comes your way. Geometric forms surround us. Be on the lookout for parallel and perpendicular lines, polygons and angles.

In this lesson you:

• Identified different types of polygons
• Worked with angles, perpendicular and parallel lines
• Calculated the perimeters of polygons
• Put perimeter to use in real-life situations

On your own:

• Get creative. Make picture frames for your favorite photographs, using paper, wood, or whatever materials you can find. Calculate the perimeters so you know what size frame you need. Standard photographs come in these sizes: 3" by 5", 4" by 6", and 5" by 7". What are the perimeters of these photos?
• Get your hands on a tape measure or ruler and measure the perimeter of a window in your house.
• We are surrounded by geometrical shapes. Look for tiles in the train station, at the park, in the kitchen and bathroom at home and at work, and wherever else your travels take you. Count the sides of these tiles and determine what kind of polygon they are. Squares? Hexagons? Octagons?