To Find the Area of a Circle

What is the formula for finding the area of a circle?

• A. A = πr

• B. A = πd

• C. A = πr^2

• D. A = πd^2

Tags

CCSS.7.G.B.4

If the radius of a circle is 5 units, what is the area?

• A. 25π

• B. 10π

• C. 15π

• D. 20π

Tags

CCSS.7.G.B.4

If the diameter of a circle is 8 units, what is the area?

• A. 16π

• B. 32π

• C. 64π

• D. 128π

Tags

CCSS.7.G.B.4

If the area of a circle is 50π square units, what is the radius?

• A. 5 units

• B. 7 units

• C. 10 units

• D. 14 units

Tags

CCSS.7.G.B.4

True or False: The area of a circle is always squared.

• A. True

• B. False

Tags

CCSS.7.G.B.4

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

What does A represent in the formula:

A = π·r²

• Area

• Radius

• Pi

• Diameter

Tags

CCSS.7.G.B.4

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared

Tags

CCSS.7.G.B.4

What number does π represent?

• 4.13

• 3.41

• pie

• 3.14

Tags

CCSS.HSG.GMD.A.1

What is the radius of a circle?

• halfway through a circle

• a line through the center of a circle

• the amount of space inside of the circle

• the distance around a circle