Pi and Circles

Two or more circles with same centre but different radii are known as _______.

• co-centric circles

• concentric circles

• intersecting circles

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

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

Tags

CCSS.7.G.B.4

What is the formulas for circumference of a circle? (Select Two.)

• C = pi x r

• C = pi x 2r

• C = pi x D

• C = pi x 2D

Tags

CCSS.7.G.B.4

If a circle has a radius of 5 ft. then which formula below is correct for the area?

• π(5)

• π(10)

• π(5)(5)

• π(10)(10)

Tags

CCSS.7.G.B.4

A segment that has one endpoint at the center and the other endpoint on the circle is the __________.

• diameter

• chord

• radius

• secant

Find the area of the circle.

• 43.96

• 153.86

• 87.82

• 307.72

Tags

CCSS.7.G.B.4

Find the area of the circle.

• 56.52 in²

• 254.34 in²

• 1017.36 in2

• 113.04 in²

Tags

CCSS.7.G.B.4

What is the circumference?

• 50.24

• 96

• 24

• 18

Tags

CCSS.7.G.B.4

What is the radius?

• 18

• 72

• 38

• 14

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