Diameter, Radius, and Circumference of Circles

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

• 62.8ft

Tags

CCSS.7.G.B.4

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

Tags

CCSS.7.G.B.4

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

Tags

CCSS.7.G.B.4

What is the distance around a circle?

• Circumference

• Area

• Diameter

• Radius

Sally has car tire with a circumference of 75.36 ft. What is the radius of the car tire and what is the diameter? (Use 3.14 for pi)

• r=12 ft

• d=26 ft

• r=13 ft

• d=24 ft

Tags

CCSS.7.G.B.4

• A

• B

• C

• D

Tags

CCSS.7.G.B.4

A circular garden has a circumference of 38.25 feet. Find the approximate diameter of the garden. Use 3.14 for Pi. Round to the nearest tenth

(a)  

Tags

CCSS.Math.Content.7.G.B.4

The circumference of a circle is found by using the formula C = πd or C = 2πr. If the circumference of a circle is 31.4 inches and the radius is 5 inches, how would you represent n? Complete the statements below. Diameter is calculated by ​ (a)   . Therefore, n would be represented by the ratio of ​ (b)   over ​ (c)   .​

• multiplying the radius by 2

• dividing the radius by 2

• 31.4

• 62.8

• 10

• 5

Tags

CCSS.7.G.B.4

Find the diameter of the circle with the given circumference. Round to the nearest hundredth

Mathematical Equivalence

OFF

Tags

CCSS.7.G.B.4

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

• A line perpendicular to the diameter of the circle