Circles and Lines

The radius of the circle is ​ (a)   , and the center is ​ (b)   .

So the equation of the circle is

​ (c)  

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Point Z is a point of tangency. Find the value of the variable.

• 12

• 4

• 8

• 6

How many common tangents do the circles have?

• 1

• 2

• 3

• 4

Determine whether the segment AB is tangent to ⊙C.

• AB is not tangent.

• AB is tangent.

Match the following

• Radius

• Tangent

• Secant

• Chord

Find the measure of the arc MN.

Determine whether the red arcs are congruent.

• They are congruent.

• They are not congruent.

• 95 degree
• 6
• congruent
• 12
• equal
• similar
• 45 degree

Find the measure of Arc AB.