Circumference and Area

What is π ? (Best Choice)

• The ratio of the circumference of any circle to its diameter.
• Exactly 3.14
• Exactly 3.1415
• Exactly 3.141593

Tags

TEKS.MATH.7.8C

A Circle has a radius of 4.  What is the circumference of the circle? (Best Choice)

• 4π or about 12.56
• 16π or about 50.24
• 2π or about 6.28
• 8π or about 25.12

Tags

CCSS.7.G.B.4

A Circle has a radius of 12 inches.  What is the circumference of the circle? (Best Choice)

• 24π or about 75.36 in
• 12π or about 37.68 in
• 144π or about 452.16 in
• 576π or about 1,808.64 in 

Tags

CCSS.7.G.B.4

A Circle has a diameter of 18 meters.  What is the area of the circle? (Best Choice)

• 9π or about 28.26 m²
• 18π or about 56.52 m²
• 81π or about 254.34m²
• 324π or about 1017.36 m² 

Tags

CCSS.7.G.B.4

A circular window has a diameter of 24 inches.  A piece of metal is to go around the window for a frame. How long does the metal need to be? (Best Choice)

• 24π or about 75.36 in
• 12π or about 37.68 
• 576π or about 1,808.64 in
• 144π or about 452.16 in 

Tags

CCSS.7.G.B.4

A center circle on a basketball court has a diameter of 12 feet.  How long is the line that wraps around the circle? (Best Choice)

• 6π or about 18.84 ft
• 12π or about 37.68 ft
• 36π or about 113.04 ft
• 144π or about 452.16 ft

Tags

CCSS.7.G.B.4

A flower pot has a radius of 8 inches.  What is the area of the (top of the) flower pot? (Best Choice)

• 4π or about 12.56 in²
• 8π or about 25.12 in²
• 16π or about 50.24 in²
• 64π or about 200.96 in²

Tags

CCSS.7.G.B.4

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

• c = 15π
• C = 2π15
• c = 15 ÷ π
• c = 15 π

Tags

CCSS.7.G.B.4

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 8322.13
• 1134.11
• 4536.46
• 1267.09

Tags

CCSS.7.G.B.4