Area & Circumference of Circles Review

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is the radius of this circle?

• 18in
• 36in
• 9in
• 8in

Tags

CCSS.7.G.B.4

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Tags

CCSS.7.G.B.4

Determine the radius of the penny

• 59.66 mm
• 9.5 mm
• 38 mm
• 119.32 mm

Tags

CCSS.7.G.B.4

If you are going to paint the entire center circle of a basketball court, do you need to know the area or circumference of the circle?

• Area
• Circumference
• Neither

Tags

CCSS.7.G.B.4

What is the formula for area of a circle?

• A = π⋅r²
  
• A = d⋅π
• A = 2⋅π⋅r
• A = 2⋅r

What is the formula for circumference of a circle?

• C = d⋅π
• C = 2⋅π⋅r
• C = π⋅r²
• C = d⋅π and
  C = 2⋅π⋅r

A DVD has a diameter of 15 millimeters. Which equation would help you determine the distance around the DVD?

• C = 15π

• A = π7.5²

• A = 15 ÷ π

• C = 7.5π

Tags

CCSS.7.G.B.4

Steven purchases a bowl. The diameter of the bowl is 14 cm.
What is the distance around the bowl?

• 21.98 cm
• 43.98 cm
• 87.96 cm
• 7 cm

Tags

CCSS.7.G.B.4

A cruise ship has a large, circular window. It has a diameter of 6 meters. How many square meters of glass is the window made of?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.27 m²

Tags

CCSS.7.G.B.4