Radius of a Circle Real World Problems

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

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

What's the radius?

Tags

CCSS.7.G.B.4

Find the radius r

• 2

• 3

• 4

• 5

Tags

CCSS.HSG.C.A.2

What is the radius?

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 15 in

• 30 in

• 7.5 in

• 225 in

Tags

CCSS.7.G.B.4

What is the radius?

Tags

CCSS.7.G.B.4

What is the radius?

Tags

CCSS.7.G.B.4