1.mr. vs wife bought some running shoes this weekend. they were on sale for $45, but they were $65...
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1. Mr. V’s wife bought some running shoes this weekend. They were on sale for $45, but they were $65 last week. What was the percent discount?
2. Estimate
3. Which side is opposite angle A?
• TOTD: adjacent
Warm-up 9/13 Pre-Calc
79
A
B
C
Warm-up 9/13 Bk. 31. Draw right triangle ABC
2. Draw parallel to
3. Draw the following figure: W is the midpoint of line segment .
• Term of the Day: Vertical Angles
GR��������������
AT�������������� �
YZ
In case your notes don’t have this…
Sin =
Cos =
Tan =
opposite
hypotenuse
adjacent
hypotenuse
opposite
adjacent
…then write it down now
θO
H
A
Get into Trios
• Two contestants, One scorekeeper• The scorekeeper holds up the triangle and
asks for a side.– “What side is opposite angle A?”
• The two contestants must say TWO LETTERS– “RV!”
• After all four pages, then the winner plays the scorekeeper and the non-winner is the new scorekeeper.
For Example… M
R V
Nab ‘em
An exercise in speed and trigonometry
Here’s the deal…
• Get out a half-sheet of paper• You’ll see a triangle on the wall• I’ll call out a Sine, Cosine, or Tangent and
an angle.• The two contenders race to “Nab” the
correct numbers and put them into the red box
• You write on the paper the correct Trig Function and fraction
12
16
20B
A
Sin A=1220
Sin B=1620
3
7
9R
Q
Cos R=39
Tan R=73
5
9
11U
F
Tan U=95
θ
10
16
8
Sin θ =816
Tan θ = 8 10
2
14
15
WM
Tan M =14 2
416
13
G
Y
Cos G = 416
V18
7
13
P
Tan V= 713
L7
6
N
2
Cos N =67
ALISON• Before you leave today,
you will take a mini-quiz.
• Until then, work on ALISON
• Or else this guy will come after you.
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