Area and Circumference of Circles

Isaac ran around a trampoline with a diameter of 8 feet seven times. How far did he run?

• 25.13 feet

• 175.93 feet

• 12.57 feet

• 87.96 feet

The diameter of the circle is 2 ¾ in. What is the circumference? What is the area?

• C=4.32 in A=13.58 in²

• C=8.64 in A= 15.5 in²

• C=23.76 A= 13.58 in²

• C=8.64 A=23.76 in²

The cardboard circle in the inside of toilet paper has a diameter of 1 ^7/8 in. the diameter of the end of the toilet paper is 4 ^1/4 in. What percentage is the area inside the cardboard circle of the area of total toilet paper?

• approx. 15%

• approx. 20%

• approx. 35%

• approx. 12%

My container that I keep my pens in is a soup can with a diameter of 2 ⅛ inches. What is the area of the bottom?

• 6.16 in²

• 3.55 in²

• 14.19 in²

• 6.67 in²

This is square dog, but he is not square! Why? An evil wizard turned him round when he was a puppy but we can help him with the power of math to turn him square once again. We only know the diameter of his head. diameter = 4.27 inches. Can you help us find the circumference and area?

• C= 13.41 inches A=14.32 inches²

• C= 14.32 inches A=13.41 inches²

• C= 6.71 inches A= 57.28 inches²

• C= 57.28 inches A=6.71 inches²

The diameter of this cupcake squishy is 10 centimeters. What would be the radius, circumference, and area of the circle?

• r=5, C=15.71, A=78.54

• r=20, C=62.83, A=314.16

• r=5, C=31.42, A=78.54

• r=20, C=15.71, A=78.54

Carl moved into a new house and just bought an antique lamp to go next to his bed. He knows the diameter of the lamp base is 18 centimeters. At least how much surface area is Carl going to need for a stand to put his lamp on?

• 56.55 cm²

• 254.47 cm²

• 1,017.88 cm²

• 28.27 cm²

Alex decided to make an art piece with the radius of 3. He wants to put white string around the outside of the circle. He also wants to fill the inside of the circle with colored string. How much water string and how much colored string will he need?

• 9.42inches of white string and 28.7 inches² of colored string

• 9.42 inches of white string and 113.1 inches² of colored string

• 18.85 inches of white string and 9.42 inches² of colored string

• 18.85 inches of white string and 28.7 inches² of colored string

What is the area of the base of a glitter jar with the diameter of 5.6 cm?

• 17.59 cm²

• 24.63 cm²

• 98.52 cm²

• 8.79 cm²

Find the diameter of the toilet paper.

Circumference: 56.55cm

• 18cm

• 9cm

• 28.23cm

• 81cm