Circles, Arcs and Angles

Find a and b.

• a=74 degrees
  b=93 degrees

• a=93 degrees
  b=74 degrees

• a=87 degrees
  b=106 degrees

• a=106 degrees
  b=87 degrees

Find the measure of the indicated angle.

• 42
  ⁰
  ⁰
  ⁰

• 51

• 36

• 45

Find x. Assume that segments that appear to be tangent are tangent.

• 11.2

• 18.0

• 25.0

• 30.0

Find x. Assume that segments that appear to be tangent are tangent.

• 2

• 11

• 7.6

• 9

What is the measure of arc DC?

• 140

• 98

• 122

• 61

Which best describes line AB?

• chord

• secant

• tangent

• diameter

Which best describes line AB?

• chord

• secant

• tangent

• diameter

What best describes segment AB?

• chord

• secant

• tangent

• diameter

The point at which a tangent line intersects a circle is known as the

• point of tangency

• point of chordom

• point of secantism

• center

• A

• B

• C

• D