Understanding Perimeter with Mr. J

What is the perimeter of a shape?

• The area inside a shape

• The length of the longest side of a shape

• The distance around the outside of a shape

• The volume of a shape

How do you find the perimeter of a triangle with sides 3 in, 3 in, and 3 in?

• Add the side lengths

• Divide the total length by the number of sides

• Multiply the side lengths

• Subtract the smallest side from the largest

When calculating the perimeter of a rectangle, why is it important to consider all four sides?

• Because the perimeter is the product of the side lengths

• Because only the longest sides matter

• Because the perimeter is the sum of all sides, labeled or not

• Because the perimeter is only the sum of the labeled sides

If a rectangle has two sides labeled as 11 cm and 8 cm, what is the perimeter?

• 38 cm

• 30 cm

• 40 cm

• 19 cm

How do you calculate the perimeter of a pentagon with sides 7 ft, 7 ft, 9 ft, 9 ft, and 15 ft?

• Add all the side lengths together

• Multiply the longest side by 5

• Subtract the smallest side from the largest

• Add the two longest sides

What is the perimeter of a parallelogram with sides 6 m and 4 m?

• 24 m

• 16 m

• 20 m

• 10 m

In the practice problems, what is the perimeter of the shape in problem five?

• 75 in

• 65 in

• 55 in

• 45 in

In the practice problems, what is the perimeter of the shape in problem six?

• 24 cm

• 34 cm

• 44 cm

• 54 cm

Why does the order of adding side lengths not matter when calculating perimeter?

• Because perimeter is a measure of area

• Because perimeter is a measure of volume

• Because addition is commutative

• Because only the longest side matters

What should you do if your calculated perimeter is different from the example but uses all side lengths?

• Recalculate using a different method

• Check if all side lengths were included

• Assume the example is incorrect

• Ignore the result