Understanding Perimeter

What is the perimeter of a rectangle with sides measuring 10 feet and 18 feet?

• 48 feet

• 28 feet

• 56 feet

• 36 feet

If a triangle has sides measuring 15 feet, 20 feet, and 14 feet, what is its perimeter?

• 48 feet

• 50 feet

• 45 feet

• 49 feet

How do you calculate the perimeter of a pentagon with each side measuring 4.2 feet?

• Multiply one side by 5 to get 21 feet

• Multiply one side by 4 to get 16.8 feet

• Add all sides to get 21 feet

• Add all sides to get 16.8 feet

A square has a perimeter of 32.4 inches. What is the length of one side?

• 8.1 inches

• 7.5 inches

• 9 inches

• 8.5 inches

Taylor wants to put lights around her room measuring 10 feet by 12 feet. If the lights cost $2 per foot, how much will she spend?

• $100

• $64

• $84

• $42