Circles

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Tags

CCSS.7.G.B.4

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

A _____ is half of a circle.

• circumference
• pi
• semicircle
•  composite figure

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the circle

find the diameter of the circle

• 1 ft

• 4 ft

• 4 mm

• 2 ft

Tags

CCSS.7.G.B.4

what is the formula for finding area of a circle

• C = π r²

• A = π r²

• A = π r² / 2

• C = 2 π r

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a diameter of 19.1 ft? 

• 60.00 ft
• 35.17 ft
• 28.67 ft
• 47.17 ft

Tags

CCSS.7.G.B.4

The diameter of a truck wheel is 56.5 inches. What is the circumference of the wheel?

• 177.49 inches
• 167.41 inches
• 157.41 inches
• 187.41 inches

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a radius of 21 cm?

• 131.88 cm
• 121.99 cm
• 111.89 cm
• 141.89 cm

Tags

CCSS.7.G.B.4