Calculating Perimeters of Rectangles

The video tutorial covers grade three geometry problems, focusing on calculating perimeters of squares and rectangles. It begins with a problem about a square with a perimeter of 24 inches, explaining how to find the side length using division. The tutorial then moves to rectangles, demonstrating how to find different length and width combinations for a given perimeter of 18 centimeters. Strategies for solving these problems, such as using addition pairs and doubling, are discussed. The video concludes with exercises involving charts and doubling perimeters to find possible dimensions for rectangles.

What is the perimeter of a square if each side is 6 inches long?

• 30 inches

• 24 inches

• 18 inches

• 36 inches

If a square has a perimeter of 24 inches, what is the length of one side?

• 4 inches

• 7 inches

• 5 inches

• 6 inches

How many sides does a square have?

• 2

• 3

• 5

• 4

What is the first step in finding the dimensions of a rectangle with a perimeter of 18 cm?

• Multiply by 3

• Divide by 3

• Divide by 2

• Multiply by 2

Which of the following is a possible dimension for a rectangle with a perimeter of 18 cm?

• 5 cm by 4 cm

• 6 cm by 3 cm

• 7 cm by 2 cm

• 8 cm by 1 cm

How many different rectangles can be drawn with a perimeter of 18 cm?

• 5

• 4

• 3

• 2

What is the perimeter of a rectangle if its length is 8 cm and width is 1 cm?

• 22 cm

• 20 cm

• 18 cm

• 16 cm

What is the sum of the length and width of a rectangle with a perimeter of 18 cm?

• 8 cm

• 11 cm

• 10 cm

• 9 cm

Which of the following is NOT a valid dimension for a rectangle with a perimeter of 18 cm?

• 3 cm by 6 cm

• 2 cm by 7 cm

• 4 cm by 4 cm

• 1 cm by 8 cm

What is a strategy to find rectangles with a specific perimeter?

• Using subtraction

• Using addition pairs

• Using multiplication

• Guessing