Areas and Circumference of Circles and Semicircles

What is the area of a circle with the diameter of 10 cm ? Round to the nearest hundredth. Don't forget to label square cm or sq cm.

(a)  

Tags

CCSS.7.G.B.4

Tags

CCSS.7.G.B.4

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Round to nearest hundredth. Don't forget to label.

(a)  

Tags

CCSS.7.G.B.4

Ms. Merine calculated that her hoop earring has a diameter of 3.5 centimeters. What is the area of her earring? Round to the nearest hundredth. Label as square centimeters or sq cm.

(a)  

Tags

CCSS.7.G.B.4

Hannah drew a circle with a radius of 30 cm. Jonas drew a circle with a radius of 20 cm. What is the approximate difference in the areas of their circles? Round to the nearest hundredth. Use a comma in your answer and label as (sq cm) or (square cm) or (square centimeter)

(a)  

Tags

CCSS.7.G.B.4

A circular track with a diameter of 60 meters is shown. Shaleah walked around the track 4 times. Approximately how many meters did she walk? Round to the nearest hundredth. Don't forget to label.

(a)  

Tags

CCSS.7.G.B.4

Find the circumference of a circle with a radius of 12.5 mm. Round to nearest hundredth. Don't forget to label.

(a)  

Tags

CCSS.7.G.B.4

A _____ is half of a circle.

• circumference

• pi

• semicircle

• composite figure

The circumference is 62.8 inches. What is the radius? Round to the nearest whole number. Don't forget to label.

(a)  

Tags

CCSS.7.G.B.4

A circular pie has an area of 706.5 cm². What is the radius of the pie? Round to nearest whole number. Don't forget to label.

(a)  

Tags

CCSS.7.G.B.4