RTI 15.3 Tangents and Circumscribed Angles We Do

Find the radius r.

• 2

• 3

• 4

• 5

Answer explanation

QS is a tangent to circle P. Find QS.

• 144

• 14

• 12

• 13

Find the value of x that ensures the segment that appears tangent, is in fact tangent, to circle C.

• x = 14.4

• x = 8.9

• x = 16

• x = 8

Find x. P is the center of the circle. Segments that appear to be tangent are tangent.

• 11.2

• 18.0

• 25.0

• 30.0

In the figure, PA and PB are the tangents to a circle of center 'O'. ∠AOB= 120⁰ then ∠APB =

• 60⁰

• 30⁰

• 120⁰

• 75⁰

Is line AB tangent to the circle?

 Hint: Use  $c^2=a^2+b^2$   and remember (8+12) is our c.

• YES

• NO
  
  

• Can't Tell
  
  

Using the tangent lines, find the value of x.

• 60

• 120

• 30

• 300

Determine if a tangent line is shown in the picture.

• Yes

• No

• Not sure

What is the definition of a tangent?

• A line that intersects the circle on two points.

• A line that passes through the center of the circle.

• A line segment that passes through the center of the circle.

• A line that intersects the circle on only one point.

Find the value of x.

• 105

• 65

• 45

• 25