Circles

What is the definition of the circumference of a circle?

• A relationship between two numbers written like a fraction.

• The space within the circle.

• The distance from the center of a circle to any other point on the edge of that circle.

• The distance all the way around a circle.

Complete the following sentence:

The diameter is ..... the radius of a circle.

• the same as

• twice

• the square root of

• three times

Tags

CCSS.HSG.C.A.2

If the radius of a circle is 6, then the diameter is .....

• 3

• 12

• 24

• 36

Tags

CCSS.7.G.B.4

If the diameter of a circle is 25, then the radius is .....

• 225

• 50

• 12.5

• 5

Tags

CCSS.7.G.B.4

The ratio for pi is .....

• circumference : diameter

• radius : circumference

• area : circumference

• diameter : area

Tags

CCSS.7.G.B.4

If the diameter of a circle is 12, calculate its circumference. Use 3.14 for pi. Round your answer to the nearest tenth.

• 18.8 units

• 37.7 units

• 75.4 units

• 452.2 units

Tags

CCSS.7.G.B.4

If the radius of a circle is 4, calculate its circumference. Use 3.14 for pi. Round your answer to the nearest tenth.

• 50.2 units

• 39.4 units

• 25.1 units

• 12.6 units

Tags

CCSS.7.G.B.4

The radius of a circle is 5. Calculate the area of that circle. Use 3.14 for pi. Round your answer to the nearest tenth.

• 7.9 u²

• 15.7 u²

• 31.4 u²

• 78.5 u²

Tags

CCSS.7.G.B.4

Calculate the area of a circle with a diameter of 14. Use 3.14 for pi. Round your answer to the nearest tenth.

• 615.4 u²

• 153.9 u²

• 87.9 u²

• 44 u²

Tags

CCSS.7.G.B.4