Circumference and Area of Circles

Which segment is the diameter?

• AC

• BD

• LM

• CE

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

• 131.9 cm

• 121.9 cm

• 111.9 cm

• 141.9 cm

Tags

CCSS.7.G.B.4

What is circumference?

• The distance around a circle.

• The space inside the circle.

• A line from side to side passing through the center.

• A line from the center to the side.

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

• 9π or about 28.26 m

• 18π or about 56.52 m

• 81π or about 254.34m

• 324π or about 1017.36 m

Tags

CCSS.7.G.B.4

Find the circumference of the circle

• 21.98

• 153.86

• 43.96

• 615.44

Tags

CCSS.7.G.B.4

The radius is 8 inches.  What is the circumference?

• 50.24 inches

• 25.12 inches

• 12.56 inches

• 200.96 inches

Tags

CCSS.7.G.B.4

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

• 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

Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the distance around the cookie?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

Tags

CCSS.7.G.B.4

Find the radius of a circle if the circumference is 37.7 cm

• 2cm

• 3cm

• 5cm

• 6cm

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 18

• 36

• 9

• 6

Tags

CCSS.7.G.B.4