Calculating Perimeters of Shapes

This lesson introduces the concept of perimeter, defined as the distance around a figure. It explains how to calculate the perimeter of a square and a rectangle by summing the lengths of their sides. The lesson uses examples of a square with equal sides and a rectangle with opposite sides equal to demonstrate the calculation process, emphasizing the simplicity of adding side lengths to find the perimeter.

What is the perimeter of a shape?

• The diagonal of a shape

• The volume of a shape

• The distance around a shape

• The area inside a shape

If a square has sides of length 5 units, what is its perimeter?

• 10 units

• 25 units

• 15 units

• 20 units

How do you calculate the perimeter of a square?

• Multiply the side length by 2

• Add the side length to the area

• Multiply the side length by 4

• Divide the side length by 4

What is the perimeter of a square with side length 7 units?

• 35 units

• 14 units

• 28 units

• 21 units

If a square has a perimeter of 28 units, what is the length of one side?

• 4 units

• 5 units

• 6 units

• 7 units

What is a key property of a rectangle's sides?

• All sides are different

• Adjacent sides are equal

• Opposite sides are equal

• All sides are equal

How do you calculate the perimeter of a rectangle?

• Add all the side lengths

• Multiply the length by the width

• Multiply the length by 4

• Add the length and width, then multiply by 2

If a rectangle has sides of 4 units and 6 units, what is its perimeter?

• 22 units

• 18 units

• 20 units

• 24 units

What is the perimeter of a rectangle with sides 3 units and 7 units?

• 10 units

• 17 units

• 14 units

• 20 units

If a rectangle has a perimeter of 20 units and one side is 4 units, what is the length of the other side?

• 12 units

• 6 units

• 8 units

• 10 units