Perimeter

Sing the perimeter song IN YOUR HEAD!

About how long did it take you?

• About 10 seconds

• About 20 seconds

• About 30 seconds

• About 1 minute

What is perimeter?

• When you multiply sides.

• The distance around the outside of a plane figure.

• The area inside the shape.

• The distance from one corner to the other corner.

How do we find perimeter?

• Divide the number of sides.

• Measure one side.

• Multiply all sides.

• Add the sum of all sides.

What is a plane figure?

• A 3-D shape.

• A small shape.

• A 2-D shape.

• A big shape.

What is a polygon?

• A shape with openings.

• A shape that has 4 sides.

• A shape with curves.

• A closed shape with straight lines.

How many of these shapes ARE polygons?

• 2

• 4

• 1

• 3

What's the perimeter?

• 9 inches

• 14 feet

• 18 feet

• 14 units

I can measure with NON-STANDARD and STANDARD units. Which one of these is a STANDARD unit of measure?

• erasers

• crayons

• paper clips

• ruler

What is the perimeter?

BE CAREFUL - There is a missing side!

• 7 inches

• 21 inches

• 14 inches

• 28 inches

What is the perimeter?

• 14 feet

• 7 units

• 14 units

• 10 inches