Features of Circles

Name the feature shown by the interval: DB

• chord

• arc

• radius

• diameter

• tangent

Point B is 17 cm from the center of the circle. AB is tangent to the circle at A. Given that AB = 15 cm, find the radius of the circle.

• 8 cm

• 9 cm

• 2 cm

• 16 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

The definition of a circle is

• set of all points in a plain that are the same distance from a point called the center

• the distance around a shape

• set of all points that have different distance from a center

• polygon that has a fixed shape

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

What is line PQ?

• diameter

• radius

• segment

• chord

What is O?

• diameter

• radius

• center

• chord

What is true about this circle?

• Radius is : DC

• Diameter is: BA

• Radius is :DE

• Diameter is: DC

What is area bounded by AB?

• Radius

• Diameter

• Segment

• Chord

Name a minor arc

• AD

• ADB

• AB

• CD