Circle Word Problems

The radius of a birthday cake is 4 inches. Icing will decorate the circumference of the cake. What procedure can be used to find the approximate circumference of the cake? Use 3.14 for π.

• Multiply 4 by 3.14.

• Multiply 4 by 2, and then multiply the product by 3.14.

• Multiply 4 by 4, and then multiply the product by 3.14.

• Divide 4 by 2, and then multiply the quotient by 3.14.

Tags

CCSS.7.G.B.4

The first Ferris wheel was built in 1893 in Chicago. Its diameter was 250 feet. How many feel did the Ferris wheel rotate with one complete turn? (Think the outside measurement of the circle.) Use 3.14 for π.

• 785 ft

• 390 ft

• 912 ft

• 543 ft

Tags

CCSS.7.G.B.4

The circumference of a circle is 36.31 meters. What is the approximate length of the radius? Use 3.14 for π.

• 3 m

• 4 m

• 5 m

• 6 m

Tags

CCSS.7.G.B.4

The circumference of a circle is 18.41 feet. What is the approximate length of the radius? Use 3.14 for π.

• 3 ft

• 5 ft

• 7 ft

• 8 ft

Tags

CCSS.7.G.B.4

A bicycle trail in the shape of a circle has a diameter of 3 miles. Kiersty biked around the trail 4 times. About how far did Kiersty bike? Use 3.14 for π.

• 38 miles

• 40 miles

• 35 miles

• 33 miles

Tags

CCSS.7.G.B.4

Mrs VanSciver bought a circular rug. The radius of the rug was 2.5 feet. How does the diameter of the rug compare to the radius? Use 3.14 for π.

• The diameter of the rug is twice the radius.

• The radius is twice the circumference.

• The diameter of the rug is half the radius.

• The diameter is twice the circumference.

Tags

CCSS.7.G.B.4

Mr. Blain designed a circular walkway in front of his house. The diameter of the walkway is about 6 feet long. How many square feet of bricks will he need to buy? Use 3.14 for π.

• 18.84 square feet

• 113.04 square feet

• 9.42 square feet

• 28.26 square feet

Tags

CCSS.7.G.B.4

Alejandra is making a tablecloth. Her table has a 7 foot diameter. How many square feet of material does she need to use? Use 3.14 for π.

• 10.9 square feet

• 153.9 square feet

• 38.5 square feet

• 21.9 square feet

Tags

CCSS.7.G.B.4

What is the approximate area of a circle with a diameter of 6.2 inches?

• 30.19 square inches

• 120.76 square inches

• 19.48 square inches

• 9.74 square inches

Tags

CCSS.7.G.B.4

Jalen is making a circular pizza with a circumference of 44 inches. What is the approximate radius of Jalen's pizza. Use 3.14 for pi.

• 14 inches

• 7 inches

• 22 inches

• 88 inches

Tags

CCSS.7.G.B.4