Geometry- Circumference and Area

What is the radius of this circle?

• 18
• 36
• 9
• 8

Tags

CCSS.7.G.B.4

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m

• 3π m

• 12 m

• 6π m

Tags

CCSS.7.G.B.4

Find the area of the circle

• 18π in²

• 81π in²

• 324π in²

• 36π in²

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a radius of 21 cm?

• 42π cm

• 21π cm

• 110.25π cm

• 441π cm

Tags

CCSS.7.G.B.4

what is the area of a circle with the diameter of 10cm ?

• 10π cm²

• 25π cm²

• 20π cm²

• 100π cm²

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 = π(15²)
• c = π(7.5²)

Tags

CCSS.7.G.B.4

What does perimeter mean?

• the amount of space inside a shape

• the amount of space inside a shape divided by two

• the distance around the shape

• half the distance around a shape

What is the formula to find circumference?

•  $c=2\pi r$  

•  $c=\pi r$  

•  $c=2\pi d$  

Tags

CCSS.7.G.B.4

What does area mean?

• the distance around a shape

• the amount of space outside a shape

• half the distance around a shape

• the amount of space inside a shape

What is the formula for area of a circle?

• πr²

• 2πr

• πd

• π7

Tags

CCSS.7.G.B.4