Tangent Lines

tangent lines

By Deb Scott

Multiple Choice

Segment ED is tangent to circle O. What is the value of x?

• 232

• 52

• 79

• 115

Multiple Choice

Assume both lines are tangent to circle O. What is the value of x?

• 90

• 115

• 120

• 45

Think back - What is Pythagorean theorem?

Fill in the Blanks

What is the distance to the horizon that a person can see on a clear day from an airplane 2 miles above Earth? Earth's radius is about 4000 miles. Round to the nearest mile.

Open Ended

What is the radius of circle O?

Two Tangents

If two tangents meet at the same exterior point, the segments are CONGRUENT.

Multiple Choice

What is the value of x?

• x=24

• x=12

• x=8

• x=6

Multiple Choice

What is the value of x?

• x=24

• x=12

• x=7

• x=6

Multiple Choice

Assume that all the lines that appear tangent are tangent. Find the perimeter of the triangle.

• 54

• 42

• 36

Multiple Choice

Assume that lines that appear to be tangent are tangent. O is the center of the circle. What is the value of x?

• 160

• 20

• 70

• 90

Multiple Choice

In each circle, what is the value of x to the nearest tenth?

• 4.25

• 14.10

• 3.75

• 6.25

Multiple Choice

What is the value of x to the nearest tenth?

• 10.7

• 114.5

• 64.2

• 5.35

Multiple Choice

What is the value of x to the nearest tenth?

• 5

• 25

• 5.5

• 4.5

Multiple Choice

Determine whether a tangent line is shown in the diagram. (Hint: Use the Pythagorean Theorem)

• Yes

• No

Multiple Choice

Determine whether a tangent line is shown in each diagram. (Use the Pythagorean Theorem)

• Yes

• No

Multiple Choice

The polygon circumscribes a circle. What is the perimeter of the polygon?

• 140

• 45

• 70

• 190

Multiple Choice

The polygon circumscribes a circle. What is the perimeter of the polygon?

• 82

• 32

• 21

• 42

Multiple Choice

If AB and CD are tangent. Find X.

• 14

• 4/3

• 180

• 90

Multiple Choice

If PQ and QR are tangent. Find X.

• -1.33333

• 180

• 90

• 3