Circles Review

Identify the radius, diameter, and circumference of a circle with a circumference of 31.4 units. (Use π = 3.14)

• Radius = 3 units, Diameter = 6 units, Circumference = 18.84 units

• Radius = 5 units, Diameter = 10 units, Circumference = 31.4 units

• Radius = 8 units, Diameter = 16 units, Circumference = 50.24 units

• Radius = 12 units, Diameter = 24 units, Circumference = 75.36 units

Zoe is making a circular garden in her backyard. She has a rope of 14 cm to mark the boundary of the garden. What would be the radius and circumference of the garden? (Use π = 3.14)

• Radius: 14 cm, Circumference: 88 cm

• Radius: 3.5 cm, Circumference: 22 cm

• Radius: 10 cm, Circumference: 60 cm

• Radius: 7 cm, Circumference: 44 cm

The distance from the center of the circle to any point on the circle is called the...

• radius

• diameter

• circumference

• area

What is the radius?

• 18

• 72

• 38

• 14

Calculate the circumference of a circle with an area of 154 square units. (Use π = 3.14)

• 30 units

• 22 units

• 44 units

• 11 units

A circle has a circumference of 37.68 units. What is its area? (Use π = 3.14)

• 113.04

• 37.68

• 25.12

• 12.56

What is a line segment from the center of a circle to any point on the circle?

• the radius

• the diameter

• the circumference

The distance all the way across the circle, but through the center, is called the...

• radius

• diameter

• circumference

• area

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.24 m²

What number do we round pi to?

• 3

• 3.1

• 314

• 3.14