Calculating Perimeter of Shapes

What is perimeter?

• The space inside a shape.

• The sum of the sides of a shape.

• The height of a shape.

• The color of a shape.

What units can be used to measure perimeter?

• Feet, inches, miles.

• Cups, gallons, liters.

• Pounds, ounces, grams.

• Seconds, minutes, hours.

How do you find the perimeter of a shape?

• Multiply all the sides.

• Subtract the smallest side from the largest side.

• Add the lengths of all its sides.

• Divide the shape into smaller pieces.

A triangle has sides that measure 12 inches, 14 inches, and 10 inches. What is its perimeter?

• 26 inches

• 32 inches

• 36 inches

• 40 inches

How many equal sides does a square have?

• 2

• 3

• 4

• 5

A square has sides that are 20 feet long. What is its perimeter?

• 40 feet

• 60 feet

• 80 feet

• 100 feet

If a square has sides of 20 feet, how can you find its perimeter using multiplication?

• 2 x 20 feet

• 3 x 20 feet

• 4 x 20 feet

• 20 x 20 feet

Why is knowing the perimeter important in building or construction?

• To know how much paint to buy.

• To know how much material is needed.

• To know how many workers are needed.

• To know the color of the building.

What shape is Anna's vegetable garden?

• Triangle

• Square

• Circle

• Rectangle

Anna's garden is 6 feet wide and 10 feet long. How much fence material does she need?

• 16 feet

• 20 feet

• 26 feet

• 32 feet