Finding Perimeter of Squares and Rectangles with Missing Side Lengths

This lesson teaches how to find the perimeter of squares and rectangles using square tiles. It begins with a review of the properties of squares and rectangles, emphasizing the difference between perimeter and area. The lesson provides a step-by-step guide to calculating the perimeter of a rectangle and verifies the calculation using square tiles. It concludes with an application problem involving a swimming pool, reinforcing the concept of perimeter.

What is a common mistake when dealing with area and perimeter?

• Mixing up area with perimeter

• Calculating area using side lengths

• Confusing perimeter with volume

• Using square tiles for area

How do you calculate the perimeter of a rectangle with sides of 5 and 3 units?

• Multiply the side lengths

• Add the side lengths: 5 + 3

• Add all side lengths: 5 + 5 + 3 + 3

• Subtract the shorter side from the longer side

What is the perimeter of a rectangle with sides 5 units and 3 units?

• 20 units

• 18 units

• 16 units

• 15 units

How can square tiles help in finding the perimeter of a rectangle?

• By calculating the volume

• By measuring the area

• By verifying the side lengths

• By determining the shape

If a rectangle has a long side of 5 units and a short side of 2 units, what is its perimeter?

• 14 units

• 16 units

• 18 units

• 12 units