Area and Circumference of a Circle

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

Tags

CCSS.7.G.B.4

A Circle has a radius of 4.  What is the circumference of the circle? (Best Choice)

• 4π or about 12.56

• 16π or about 50.24

• 2π or about 6.28

• 8π or about 25.12

Tags

CCSS.7.G.B.4

The circumference is 62.8 inches.  What is the radius?

• 20 inches

• 10 inches

• 6.28 inches

• 31.4 inches

Tags

CCSS.7.G.B.4

A circular pie has an area of 706.5 cm². What is the radius of the pie?

• 225 cm

• 30 cm

• 15 cm

• 112.5 cm

Tags

CCSS.7.G.B.4

Emma, Aria, and Mason are planning to build a circular garden in their backyard. They need to calculate the area of the garden to know how much soil they need. What is the formula they should use to calculate the area of their circular garden?

• πr^3

• πr^2

• πr

• 2πr

Tags

CCSS.7.G.B.4

Grace, Aria, and Samuel are planning a race around a circular track. If the track has a radius of 5 cm, what would be the total distance they would have to run to complete one full lap around the track? (Use π = 3.14)

• 10 cm

• 15.7 cm

• 25 cm

• 31.4 cm

Tags

CCSS.7.G.B.4

Nora, Hannah, and Zoe are in a math class. Their teacher asks them to calculate the circumference and area of a pizza they are planning to order for a party. Which value of π (pi) should they use for their calculations?

• 2.71828

• 3.14159

• 1.61803

• 4.66920

Tags

CCSS.HSG.GMD.A.1

Isla is making a circular garden in her backyard. If the diameter of the garden is 12 cm, what would be the circumference of the garden? (Use π = 3.14)

• 9.42 cm

• 37.68 cm

• 24.56 cm

• 15.72 cm

Tags

CCSS.7.G.B.4