Solve Perimeter Problems

In this topic, students will:

• find the perimeter of different polygons

• find the perimeter of different polygons with common shapes

• use the given sides of a polygon and and the known perimeter to find the unknown side length

• understand the relationship of shapes with the same perimeter and different areas

• understand the relationship of shapes with the same area and different perimeters

• understand the relationship between numbers to simplify and solve problems involving perimeter

Vocabulary: 

Perimeter - the distance around a figure

Equilateral triangle - a triangle with 3 equal sides

At-home Practice:

Supplies:

• a deck of cards (Remove face cards)

• graph paper

• 2 different types of writing utensils (Give one to each player)

Split the deck evenly between players. Player 1 flips over 2 cards and draws a rectangle using the cards as side lengths. Then he/she calculates the perimeter of the figure. (Ex. Player 1 flips over a 3 and 5. Player 1 draws a rectangle that is 3 squares long by 5 squares wide. He/she calculates the perimeter to be 16.) Player 2 then goes. Continue playing until the graph paper is full.