Understanding Circles and Their Properties

What is the formula for the circumference of a circle?

• 2πr

• r²

• πr²

• πd

How is the area of a circle related to the shape of a rhombus?

• The area of a rhombus is unrelated to a circle.

• The area of a rhombus is twice that of a circle.

• The area of a rhombus is half that of a circle.

• The area of a rhombus can be used to derive the area of a circle.

What is the formula for the area of a circle?

• r²

• πr²

• 2πr

• πd

If a circle's circumference is 76 cm, what is its diameter?

• 24.2 cm

• 38 cm

• 12.1 cm

• 76 cm

What is the relationship between the radius and diameter of a circle?

• The radius is twice the diameter.

• The radius is unrelated to the diameter.

• The radius is equal to the diameter.

• The radius is half the diameter.

Given a circle with a diameter of 37 inches, what is its radius?

• 74 inches

• 37 inches

• 9.25 inches

• 18.5 inches

How much farther does Mai travel than Kieran in one carousel rotation?

• 106.76 feet

• 56.52 feet

• 34 feet

• 50.24 feet

What is the diameter of a coin that rolls 33 cm in five rotations?

• 3.3 cm

• 2.1 cm

• 10.5 cm

• 5 cm

How far does a quarter roll in eight rotations?

• 33 cm

• 24 cm

• 48 cm

• 60.288 cm

How many rotations does a dime make if it rolls 41.8 cm?

• 3.5 rotations

• 5 rotations

• 10 rotations

• 7.4 rotations