Area and Circumference Review

 What is the circumference of a circle with a radius of 4 inches? Use 3.14 for π.

• 12.56 inches
• 25.12 inches
• 50.24 inches
• 2.55 inches

 A school’s art teacher designs a circular flower bed inside a rectangular sandbox. The sandbox is 6 feet wide and 10 feet long. 
How many square feet will there be for sand after the flower bed is installed? Use 3.14 for π.

• 22 square feet
• 28 square feet
• 32 square feet
• 41 square feet

 Shawn is placing a fence around a circular garden with a 15-foot diameter. How many feet of fencing will Shawn need to buy to enclose the garden? Use 3.14 for π. Round UP to the nearest foot (you may have to buy more to fence the whole thing). 

• 47 feet
• 48 feet 
• 177 feet 
• 707 feet 

Here is a picture of a Ferris wheel. It has a diameter of 80 meters.How far does a rider travel in three complete rotations around the Ferris wheel?

• 753.6 meters
• 251.2 meters
• 125.6 meters
• 376.8 meters

Tags

CCSS.7.G.B.4

A circular kitchen table has a diameter of 60 inches. How much fabric is needed to cover the table top?

• 2,826 square inches
• 188 square inches
• 11,304 square inches
• 1,147 square inches

Leiko lays a rectangular piece of construction paper on her desk. The construction paper is 16 centimeters long and 8 centimeters wide. She is able to cut two congruent circles from the construction paper as shown. After Leiko cuts the circles, approximately how many square centimeters of construction paper will she have left over? (Use 3.14 as an approximation of pi.)

• 27.52 square centimeters
• 50.24 square centimeters
• 77.76 square centimeters
• 100.48 square centimeters

The radius of the center circle on a soccer field is 10 yards. What are the circumference ( C ) and the area ( A ) of the center circle in yards?Please round answers to the nearest whole numbers and use 3.14 for 

• c = 31 yd ; a = 986 square yards
• c = 63 yd ; a = 314 square yards
• c = 31 inches ; a = 986 square inches
• c = 63 inches ; a = 314 square inches

The circumference of a pizza is 35 inches. What is the approximate  radius of the pizza?

• 11 inches
• 5.6 inches
• 17.5 inches
• 3.5 inches

Tags

CCSS.7.G.B.4

Gregory want to fertilize and fence a circular vegetable garden.  The diameter of the vegetable garden is 50 meters. How many square meters will need to be fertilized? 

• 1,963 square meters 
• 7,850 square meters
• 157 square meters
• 1,157 square meters

Tags

CCSS.7.G.B.4

Gregory want to fertilize and fence a circular vegetable garden.  The diameter of the vegetable garden is 50 meters. How much fencing is needed?

• 157 meters
• 314 meters
• 7,850 meters
• 1,963 meters

Tags

CCSS.7.G.B.4