Radius, diameter, circumference

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Tags

CCSS.HSG.C.A.2

Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?

• 28 cm
• 43.96 cm
• 87.96 cm
• 7 cm

Tags

CCSS.7.G.B.4

The homeowners association wants to enclose the playground in a fence. So they need to figure out how much fencing will they need to purchase. Is this question finding the area or the circumference of a circle?

• area

• circumference

• neither

Tags

CCSS.7.G.B.4

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

Tags

CCSS.7.G.B.4

If you divide the circumference of a circle by its diameter, what answer will you always get?

• The radius

• The area

• Pi

• cake

Tags

CCSS.7.G.B.4

• 6 in
• 12.4 in
• 2.7 in
• 8.5 in

Tags

CCSS.7.G.B.4

A _____ is half of a circle.

• circumference

• pi

• semicircle

• composite figure

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the PERIMETER of her welcome mat in feet? Round to the nearest hundredth. Don't forget to label.

Tags

CCSS.7.G.B.4

What is the area of this semi circle? 

• 100.5 square cm
• 25.1  square cm
• 50.3 square cm
• 12.6 square cm

Tags

CCSS.7.G.B.4

A circular sinkhole has a radius of 13 meters. A week later, it has a diameter of 104 meters. How much greater is the circumference of the sinkhole compared to the previous week?

• 612.3 m

• 285.74 m

• 244.92 m

• 256.02 m

Tags

CCSS.7.G.B.4