Circles Review

Harper, Scarlett, and Hannah are planning a picnic and they want to bring a circular blanket to sit on. If the blanket has a radius of 5 units, what would be the circumference of the blanket? (Use π = 3.14)

• 10 units

• 31.4 units

• 25 units

• 15.7 units

A circle has a diameter of 12 cm. What is its circumference? (Use π = 3.14)

• 15.72 cm

• 24.56 cm

• 37.68 cm

• 10.26 cm

What is the area of a circle with a radius of 8 units? (Use π = 3.14)

• 64 square units

• 200.96 square units

• 16 square units

• 50.24 square units

What does the line segment on the circle represent?

• the radius

• the diameter

• the circumference

What is the circumference of the circle?

• 25.12 in.

• 12.56 in.

• 50.24 in.

The largest possible circle is to be cut from a 12 foot square board. What will be the approximate area, in square feet, of the inscribed circle? Round your answer to the nearest whole number.

• 72 ft²

• 113 ft²

• 144 ft²

• 324 ft²

a

b

c

d

Chord

Radius

Circumference

Diameter

Find the Circumference of the Circle: (3.14 for π)

• 1,017.36 in

• 28.26 in

• 112.82 in

• 56.52 in

A line that touches a circle in just one point.

• tangent

• chord

• secant

• radius

What is the diameter?

• 8

• 16

• 10

• 4