WorksheetsCosine Rule
Total questions: 10
Worksheet time: 16mins
Name
Class
Date
1.
What rule should you use?
a)
Sine
b)
Cosine
2.
What is the measure of angle A?
a)
50 degrees
b)
60 degrees
c)
78 degrees
d)
74 degrees
3.
Which of the following formulas is the Cosine rule?
a)
c2 = a2 + b2 - 4ac + cosA
b)
c2 = a2 - b2 - 2abcosC
c)
c2 = a2 + b2 - 2abcosC
d)
(cos A)/a = (cos B)/b
4.
Find the unknown side length, c.
a)
6.52
b)
6.38
c)
6.91
d)
6.67
5.
In the ABC we have AB = 5cm, AC = 6cm, α = 60°. Find the length of the side BC.
a)
√31cm
b)
√29cm
c)
√25cm
d)
√15cm
6.
Find the missing angle θ
a)
27.9o
b)
29.2o
c)
26.8o
d)
45o
7.
Find the missing side x
a)
60.5mm
b)
10.3mm
c)
30.1mm
d)
58.1mm
8.
Find the length of BC using Cosine Rule.
a)
626.70
b)
25.03
c)
313.35
9.
We can use SOH-CAH-TOA for...
a)
Any triangle ever
b)
Non-right triangles only
c)
Right Triangles only
d)
Never
10.
Find the missing side x
a)
2.36cm
b)
9.21cm
c)
3.16cm
d)
4.51cm
100 %
