Circle Geometry

What is the formula to find the circumference of a circle?

• 2 * r

• r^2

• π * r

• 2 * π * r

Tags

CCSS.7.G.B.4

If the radius of a circle is 5 cm, what is its diameter?

• 3 cm

• 15 cm

• 7 cm

• 10 cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 12 inches, what is its radius?

• 10 inches

• 6 inches

• 8 inches

• 4 inches

Tags

CCSS.7.G.B.4

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

• The diameter of a circle is equal to the radius divided by 3.

• The diameter of a circle is equal to half the radius.

• The diameter of a circle is equal to the radius squared.

• The diameter of a circle is equal to 2 times the radius.

Tags

CCSS.7.G.B.4

If the circumference of a circle is 31.4 cm, what is its diameter?

• 15 cm

• 20 cm

• 25 cm

• 10 cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 10 meters, what is its radius?

• 3 meters

• 8 meters

• 5 meters

• 12 meters

Tags

CCSS.7.G.B.4

What is the formula to find the area of a circle?

• A = 2πr

• A = 2r^2

• A = πr^2

• A = πr

Tags

CCSS.7.G.B.4

If the radius of a circle is 8 cm, what is its circumference?

• 32π cm or approximately 100.48 cm

• 16π cm or approximately 50.24 cm

• 64π cm or approximately 200.96 cm

• 4π cm or approximately 12.56 cm

Tags

CCSS.7.G.B.4

If the circumference of a circle is 50.24 inches, what is its radius?

• The radius is 12 inches

• The radius is 6 inches

• The radius is 8 inches

• The radius is 10 inches

Tags

CCSS.7.G.B.4

If the area of a circle is 154 square units, what is its radius?

• 5 units

• 11 units

• 7 units

• 20 units

Tags

CCSS.7.G.B.4