Properties of Tangents to a Circle

Why is angle OAB =90^o ?

• tangents to circle

• sum of angles in quadrilateral

• tangents to circle from external point

• line from external point of tangents bisect angle formed between radius of circle

What kind of line is LP?

• Tangent

• Secant

• Chord

• Diameter

In the diagram, AC is tangent to circle B, find the length of CB.

• 6

• 7

• 8

• 9

Two tangents CD and CB intersect circle A. Find the length of the tangent segment BC.

• 2

• 3

• 9

• 14

Is line AB tangent to the circle?

• YES

• NO
  NO

• Can't Tell
  Can't Tell

QS is a tangent to circle P.  Find QS.

• 144

• 14

• 12

• 13

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

• 20

• 15

• 10

• 5

A tangent is a line that _______. 

• passes through the center of the circle

• intersects the circle at two points

• intersects the circle at one point

• follows the circumference of a circle

A tangent line intersecting with a radius always creates a ____________ angle

• right

• acute

• obtuse

• straight

Find the measure of segment NQ

• 5

• 10

• 25

• 7