Circles Review

What do we call the distance around a circle?

(green line in this image)

• circfrence

• perimeter

• circumference

• camfrance

If the diameter of a circle is 12 inches, how long is the radius?

Tags

CCSS.7.G.B.4

Which of the following is the formula for circumference? (be sure to choose ALL of the possibilities!)

• C = 𝛑d

• C = 𝛑r²

• C = 2𝛑

• C = 𝛑r

• C = 2𝛑r

Tags

CCSS.7.G.B.4

Calculate the circumference of this circle.

Round to two decimal spots if necessary,

and use "cm" as your unit.

Tags

CCSS.7.G.B.4

Calculate the circumference of this circle.

Round to two decimal spots if necessary,

and use "feet" as your unit.

Tags

CCSS.7.G.B.4

Which of the following is the formula for area of a circle?

• A = 𝛑d

• A = 𝛑r²

• A = 𝛑r

• A = 𝛑d²

• A = 2𝛑r

Tags

CCSS.7.G.B.4

Calculate the area of this circle.

Enter ONLY THE NUMBER (no units),

and round to two decimal spots if necessary.

Tags

CCSS.7.G.B.4

Calculate the area of this circle.

Enter ONLY THE NUMBER (no units),

and round to two decimal spots if necessary.

Tags

CCSS.7.G.B.4

Circle A has a radius of 4.75 inches.

Circle B has a diameter of 9.25 inches.

Which circle has the larger circumference?

• Circle A

• Circle B

Tags

CCSS.7.G.B.4

Circle X has a circumference of 31.4 feet.

Circle Y has an area of 50.24 ft².

Which circle has the larger radius?

• Circle X

• Circle Y

Tags

CCSS.7.G.B.4