Geometry With Circles

The radius is ____ the diameter

• half

• double

• one third of

• bigger than

What is this?

• Compass

• Circle creator

• Pencil swingy-thing

• Arc maker

The _____ is the distance from the center to any point on the circle.

• diameter

• radius

• π

• center

Match the items to the proper parts of this image

a

b

c

Secant

Tangent Line

Diameter

Label each of the following.

d

c

b

a

Radius

Secant

Tangent

Chord

The distance across a circle through its center is called the _____.

• diameter

• radius

• π

• center

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

• 62.8ft

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft