Compare Radius and Diameter Area Circle Circumference

How does a circumference compare to the diameter of a circle?

• The circumference is about three times the size of the diameter.

• The circumference is about half the size of the diameter.

• The diameter is about two times the size of the circumference.

• They are the same.

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 18

• 10

• 9

• 8

Tags

CCSS.7.G.B.4

An architect is making a plan for a new circular playground. If the picture below is the playground, how much fencing needs to go up to keep the kids in the circle? Use 3.14 for π.

• 3,215 m

• 201 m

• 402 m

• 100 m

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

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

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

The circle represents a tablecloth that Angie bought. She wants to sew fringe along the edge of the tablecloth. How many of fringe does she need to buy? Use 3.14 for π.

• 12.4 ft

• 7.9 ft

• 19.6 ft

• 15.7 ft

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

Mario ordered a pizza that had a diameter of 14 inches. What is the approximate area of the pizza?

• 22 in^.2

• 44 in^.2

• 154 in^.2

• 616 in^.2

Tags

CCSS.7.G.B.4

Find the area of the circle below.

• 8.76 cm²

• 18.52 cm²

• 21.90 cm²

• 28.26 cm²

Tags

CCSS.7.G.B.4