Circles, Chords, Tangents, Angles, Arcs

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 best describes segment AB?

• chord
• secant
• tangent
• diameter

Name the tangent line. 

• s
• WR
• VT
• QR

A line segment that passes through the center of a circle, connecting two points on a circle is called ________________.

• diameter
• radius
• circumference
• area

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

• right
• acute
• obtuse
• straight

What is the value of x?

• 22
• 25
• 15
• 20

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

• 54
• 36
• 48
• 42

Lines AO and BO are tangent. What is the measure of BO?

• 20
• 15
• 10
• 5

Find the radius r

• 2
• 3
• 4
• 5

If the measure of arc ABC = 210°, what is the measure of ∠AOC?

• 150°
• 100°
• 210°
• 105°