Circles Proof

What is the value of DC? (to the nearest hundredth) 

• 9.43
• 4.43
• √89
• 9

Lines AO and BO are tangent. What is the measure of BO?

• 20
• 15
• 10
• 5

find the measure of angle a

• 30
• 21
• 60
• 120

find the measure of x

• 38
• 21
• 27
• 96

find the measure of y

• 30
• 60
• 90
• 180

Find the measure of angle BDC.

• 35
• 40
• 75
• 110

Find the measure of angle EFH.

• 61
• 65
• 114
• 130

The intercepted arc of an inscribed angle  is ___________________ the measure of the inscribed angle.

• congruent to
• half
• double
• supplementary to 

Two tangents of a circle that meet outside of the circle at one point are _________.

• congruent
• perpendicular
• the same

Is line AB tangent to the circle?

• YES
• NO
  NO
• Can't Tell
  Can't Tell