THE LAW OF
SINES AND COSINES
JEOPARDY
Mrs. BELCHER
Math 4
Directions
•
•
•
•
•
Each person should work out every problem
on their paper
Rotate through your group who works the
problem on the white board and displays the
answer to earn points
Don’t hold up your white board until I ask for
them
Every team that gets the correct answer earns
points
Each team needs to keep their own score
JEOPARDY
SINE OF THE
TIMES
IT’S OK…
THEY’RE
COSINES
HOW MANY
SOLUTIONS?
KEEP ON A
SOLVIN
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
SINE OF THE TIMES 100
•
If A = 63°, B = 19°, and a = 2.4,
find b to the nearest tenth using the
Law of Sines.
A. 0.9
B. 0.7
C. 6.6
D. 3.6
SINE OF THE TIMES 200
• If B = 14°, C = 45°, and b = 5.2, find
c to the nearest tenth using the Law
of Sines.
A. 1.8
B. 6.1
C. 15.2
D. 0.9
SINE OF THE TIMES 300
•
If a = 12, B = 27°, and b = 15, find
A to the nearest degree using the
Law of Sines.
A. 132°
B. 21°
C. 35°
D. 118°
SINE OF THE TIMES 400
•
If A = 50°, b = 10, and a = 14, find
C to the nearest degree using the
Law of Sines.
A. 57°
B. 73°
C. 33°
D. 97°
IT’S OK… THEY’RE COSINES 100
• If a = 21.5, b = 13, and C = 39°, find
c to the nearest tenth using the Law
of Cosines.
A. 7.5
B. 14.1
C. 21.9
D. 4.4
IT’S OK… THEY’RE COSINES 200
• If A = 52°, b = 54 and c = 49, find a
to the nearest tenth using the Law of
Cosines.
A. 3.9
B. 56.2
C. 45.3
D. 78.6
IT’S OK… THEY’RE COSINES 300
• If a = 3, b = 7 and c = 5, find B to the
nearest degree using the Law of
Cosines.
A. 120°
B. 38°
C. 22°
D. 90°
IT’S OK… THEY’RE COSINES 400
•
If a = 5, b = 6, and c = 8, find A to
the nearest degree using the Law of
Cosines.
A. 141°
B. 124°
C.
D.
39°
20°
HOW MANY SOLUTIONS 100
•
Determine the number of possible
solutions, given a = 33, b = 50 and
A = 132°
A. None
B. One
C. Two
HOW MANY SOLUTIONS 200
•
Determine the number of possible
solutions, given b = 150, a = 125
and A = 25°
A. None
B. One
C. Two
HOW MANY SOLUTIONS 300
•
Determine the number of possible
solutions, given A = 38°, B = 63°,
and c = 15
A. None
B. One
C. Two
HOW MANY SOLUTIONS 400
•
Determine the number of possible
solutions, given b = 15, c = 13, and
C = 50°
A. None
B. One
C. Two
KEEP ON A SOLVIN’ 100
•
In order to solve the triangle given
b = 40, c = 45, and A = 51°, which
equation should you use first to solve.
A.
B.
C.
D.
a² = b² + c² - 2bc·cos A
b² = a² + c² - 2ac·cos B
c² = a² + b² - 2ab·cos C
Law of Sines
KEEP ON A SOLVIN’ 200
•
If B = 41°, C = 52°, and c = 27, find
a to the nearest tenth.
A. 22.5
B. 34.2
C. 37.6
D. 23.9
KEEP ON A SOLVIN’ 300
• If A = 52°, b = 12, and c = 16, find B
to the nearest degree.
A. 80°
B. 43°
C. 85°
D. 48°
KEEP ON A SOLVIN’ 400
• If A = 53°, b = 40, and c = 49, find C
to the nearest degree.
A. 15°
B. 52°
C. 75°
D. 83°
CORRECT!!!!
GOOD JOB!!!
GO BACK TO
THE BOARD
AND CHOOSE
ANOTHER
QUESTION!!!
INCORRECT!!!!
SORRY!
GO BACK TO
THE QUESTION
AND TRY
AGAIN!
CORRECT!!!!
GOOD JOB!!!
GO BACK TO
THE BOARD
AND CHOOSE
ANOTHER
QUESTION!!!
INCORRECT!!!!
SORRY!
GO BACK TO
THE QUESTION
AND TRY
AGAIN!