Exploring Circles

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

• 2 * radius

• radius * radius

• 2 * pi * radius

• pi * radius

Tags

CCSS.7.G.B.4

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

• 8 cm

• 12 cm

• 15 cm

• 10 cm

Tags

CCSS.7.G.B.4

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

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

• The diameter of a circle is half the length of its radius.

• The diameter of a circle is three times the length of its radius.

• The diameter of a circle is twice the length of its radius.

Tags

CCSS.HSG.C.A.2

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

• A = πr^3

• A = πd

• A = 2πr

• A = πr^2

Tags

CCSS.7.G.B.4

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

• 3 cm

• 6 cm

• 9 cm

• 15 cm

Tags

CCSS.7.G.B.4

What is the value of pi (π) approximately?

• 3.14159

• 3.142

• 3.1415

• 3.14

Tags

CCSS.HSG.GMD.A.1

If the circumference of a circle is 30 cm, what is its radius?

• 10 cm

• 4.77 cm

• 6 cm

• 3 cm

Tags

CCSS.7.G.B.4

If the area of a circle is 64π cm², what is its radius?

• 8

• 32

• 16

• 4

Tags

CCSS.7.G.B.4

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

• The circumference is equal to the radius times the diameter.

• The circumference is equal to the diameter squared.

• The circumference is equal to half the diameter.

• The circumference is equal to pi times the diameter.

Tags

CCSS.7.G.B.4

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

• 4π cm

• 64π cm

• 32 cm

• 16π cm

Tags

CCSS.7.G.B.4