Calculating Perimeter of Shapes

Maria introduces the concept of perimeter, explaining it as the measure around a shape. She demonstrates how to calculate perimeter using units and provides examples with different shapes. The lesson includes using rulers to measure perimeter in centimeters and inches, and concludes with a final example of calculating perimeter in inches.

What does the term 'perimeter' mean?

• The area of a shape

• The height of a shape

• The walk-around measure of a shape

• The volume of a shape

From which language does the word 'perimeter' originate?

• Greek

• French

• Spanish

• Latin

When calculating the perimeter of a shape, what should you count?

• The area inside the shape

• The units around the shape

• The number of lines

• The number of corners

In the example with the funny shape, what was the perimeter?

• 18 units

• 12 units

• 14 units

• 16 units

What mistake do some children make when calculating perimeter?

• Counting the volume instead of the perimeter

• Counting the lines instead of the units

• Counting the height instead of the perimeter

• Counting the area instead of the perimeter

What was the perimeter of the second shape example?

• 16 units

• 12 units

• 14 units

• 18 units

How do you calculate the perimeter of a rectangle if the side lengths are given?

• Multiply the side lengths

• Add all the side lengths

• Subtract the side lengths

• Divide the side lengths

If a rectangle has sides of 6 units and 3 units, what is its perimeter?

• 21 units

• 12 units

• 15 units

• 18 units

What is the perimeter of a shape with sides measuring 12 cm and 30 cm?

• 84 cm

• 54 cm

• 72 cm

• 42 cm

How many inches are in one foot?

• 10 inches

• 11 inches

• 12 inches

• 13 inches