Tangent Lines to a Circle

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

• 90

• 309

• 129

• 39

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

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

• 4.25

• 14.10

• 3.75

• 6.25

What is the value of x to the nearest tenth?

• 10.7

• 114.5

• 64.2

• 5.35

What is the value of x to the nearest tenth?

• 5

• 25

• 5.5

• 4.5

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

• Yes

• No

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

• 140

• 45

• 70

• 190

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

• 82

• 32

• 21

• 42

Which shows a tangent line?

• 
• 
• 
• 

If a line is tangent to a circle, then it is ________ to the radius drawn to the point of tangency.

• parallel

• adjacent

• supplementary

• perpendicular