Tangent Lines with Circles

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

• 20

• 15

• 10

• 5

Is line AB tangent to the circle?

• YES

• NO
  NO

• Can't Tell
  Can't Tell

A tangent is a line that touches a circle at just one point and forms a right angle with the circle's radius.

• True

• False

In the diagram, a tangent and a line drawn to the point of tangency form a right triangle. Solve for "?" (the length of the hypotenuse)

• 15

• 6

• -24

• 14

find the measure of y

• 30

• 60

• 90

• 180

What can you conclude from the picture?

• m is parallel to circle C

• m is skew to circle C

• m bisects circle C

• m is tangent to circle C

Is line AB tangent to the circle?

• YES

• NO
  NO

• Not Enough Info

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

• congruent

• perpendicular

• the same

What can you conclude?

• AB and AC are not congruent.

• AB= half of AC

• AC = half of AB

• AB=AC

Find the measure of angle ABD.

• 14

• 51

• 37

• 65