Area and Circumference of a Circle Quiz

What is the formula to calculate the area of a circle using the radius?

• A = 0.5πr^2

• A = πr^2

• A = πr

• A = 2πr

Tags

CCSS.7.G.B.4

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

• 25 cm^2

• 15.7 cm^2

• 10.5 cm^2

• 78.5 cm^2

Tags

CCSS.7.G.B.4

If the diameter of a circle is 10 cm, what is the area of the circle?

• 5 cm²

• 78.5 cm²

• 31.4 cm²

• 15.7 cm²

Tags

CCSS.7.G.B.4

If the radius of a circle is 6 cm, what is the circumference of the circle?

• 12.56 cm

• 24.68 cm

• 45.32 cm

• 37.7 cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 14 cm, what is the circumference of the circle?

• 36.78 cm

• 10.5 cm

• 28.26 cm

• 43.98 cm

Tags

CCSS.7.G.B.4

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

• 16 cm^2

• 50.24 cm^2

• 64 cm^2

• 201.06 cm^

Tags

CCSS.7.G.B.4

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

• 37.7 cm

• 9.42 cm

• 24.56 cm

• 15.72 cm

Tags

CCSS.7.G.B.4

The radius of a circle is 3 cm.  What is the circle's diameter?

• 9.4 cm
• 6 cm
• 18.8 cm

Tags

CCSS.7.G.B.4

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2