Vocabulary
Tangent Lines
Chords and Diameters
Congruent Chords, Arcs, Segments
Circles
100
What type of line is FG?
Secant
100
42.13
100
What is the length of RS?
10
100
Find x.
33
100
The equation of a circle is given. What is the radius? What is the center?
(x-4)2 + (y-1)2 = 16
Radius: 4
Center: (4, 1)
200
A line is tangent to a circle if and only if it is ____________________ to a radius drawn to the point of tangency.
perpendicular
200
Find the perimeter of the quadrilateral.
63.8
200
Find x.
5
200
In the diagram, CD=108, while AB=6(-3y-6). Solve for y. 
-8
200
The graph of two circles are shown. What is the equation of each circle?
x2 + y2 = 9
(x-2)2 + (y+5)2 = 9
300
Fill in the blanks...
The distance from the center of a circle to a point on the circle is the ______.
A segment joining any 2 points on the circle is the _________.
A chord that passes through the center of the circle is called the _______.
A line that intersects a circle at exactly 2 points is called the _______.
A line that intersects a circle at exactly 1 point is called the ________.
Radius
Chord
Diameter
Secant
Tangent
300
Solve for x.
8
300
In the pictured circle, DE is a chord, while B is the center of the circle. If AC=7 and CB=28, find the measure of DE. 
42
300
Give the measure of WV.
29
300
A circle has a center of (4, -1) and a radius of 6 units. What is the equation?
(x - 4)2 + (y + 1)2 = 36
400
Identify the following:
A radius
A diameter
A chord
Radius: AH or AF
Chord: GD or HF or CD
400
Solve for x in both pictures.
63
22
400
AB is a chord in circle M whose radius is 25.5 cm. ME is a radius of the circle. AB and ME intersect at point D. If AB = 40.8 cm, what is the length of DE?
400
Find the following:
Length of QO
Length of OU
Length of QP
Length of PV
Length of VO
65
65
66
33
56
400
A circle has a center of (-9, 7) and a radius of sqrt 5 units. What is the equation?
(x + 9)2 + (y - 7)2 = 5
500
If a diameter or radius is perpendicular to a chord, then it _________________ the chord and its arc.
If two segments from the same external point are tangent to a circle, then they are __________________________.
Two chords are congruent if their corresponding ____________________ are congruent.
bisects
congruent
arcs or central angles
500
If TP = 3(4b - 4) and SP = b + 32, give the measure of TP.
36
500
If the radius is 9, what is the length of BD?
16.97
500
Find the following:
Length of NO
Length of PT
Length of PV
Length of SO
x
30
24
24
18
12
500
The point (-7, 2) lies on a circle. The center of the circle is (-1, 4). Find the equation of the circle.
(x + 1)2 + (y - 4)2 = 40