Transcript 11-1 Tangent Lines - Oologah

12-1 Tangent Lines
To use properties of a tangent to a circle.
Students will draw diagrams of circles and tangent
lines and identify important relationships, such as
segment lengths and angle measurements.
12-1 Quiz
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The following questions are to help you
decide how well you understood today’s
lesson.
Be sure to record the number you get
right on your portfolio sheet!
Please ask if you miss one and don’t
understand why 
1. Assume that lines that appear to be tangent are tangent. O is the
center of the circle. Find the value of x. (Figures are not drawn to scale.)
A.
B.
C.
D.
291
69
55.5
222
x°
O
B
A.
B.
C.
D.
18.1
18.7
21.6
19.3
C
A
D
J
A.
B.
C.
D.
33
38
46
66
A
B
O
L
K
C
A.
B.
C.
D.
78
39
102
24
Q
P
x°
O
Non-Response
Grid
5. Pentagon RSTUV is circumscribed about a circle.
Solve for x for RS = 10, ST = 13, TU = 11, UV = 12,
and VR = 12. The figure is not drawn to scale.
A.
B.
C.
D.
11
8
4
6
R
x
V
S
U
T
Non-Response
Grid
Assignment
12-1 p.767-768
#6-26even
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Be sure to RATE your understanding of the lesson
4-3-2-1-0 after you finish it AND give me one
complete sentence as to why you rated yourself
that way then summarize what the lesson was
about in a couple of complete sentences.