Line Segments Day 2

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.
• The measurement around the circle
• The measurement from and edge of the circle to another edge through the center
• A line perpendicular to the diameter of the circle

Which shows a tangent line?

• 
• 
• 
• 

A tangent line intersects the circle ...

• at exactly two points

• at exactly one point

• through the center

• with the diameter

Using lines tangent to the circle, find the value of x.

• 57

• 137

• 47

• 257

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

• right
• acute
• obtuse
• straight

What are the coordinates of the center and the radius of the circle with equation:

(x - 4)² + (y - 3)² = 25 ?

• Center (4,3)

  Radius = 5 units

• Center (4,3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 5 units

What is the radius of the circle

(x + 7)² + (y - 2)² = 144 ?

• 7

• 12

• 24

• 144

A circle has the equation  
x² + y² - 12x + 8y + 3 = 0.  Write the equation in standard form.

• (x - 6)² + (y + 4)² = 49
• (x + 4)² + (y - 6)² = 49
• (x - 6)² + (y + 4)² = 55
• x² + y² = 55

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

• 54
• 36
• 48
• 42

  $BD=12$  and  $AC=3$  in circle A. Find the radius  $AB.$  

•  $\sqrt{27}$  

•  $\sqrt{45}$  

•  $6$  

•  $\sqrt{18}$