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WorksheetsUnit 3 review
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
If you are given ASA what law will you use to find the remaining sides
a)
Law of Cosines
b)
Law of Sines
c)
Law of Math
2.
What is the equation for Law of Sines?
a)
SinA/a=SinB/b=SinC/c
b)
SinA/SinB=A/SinC
c)
SinC=SinB
d)
a/sinA =b/sinB =c/sinC
3.
What is the angle of B
a)
52
b)
94
c)
80
d)
77
4.
What is side x?
a)
26.53
b)
31.78
c)
24.87
d)
21.46
5.
What is the equation for Law of Cosines if you are trying to find side A?
a)
a²=b²+c²-2bc∙Cos(A)
b)
a²=c²+ab²-Sin(B)
c)
b²=a²-ab²+Cos(A)
6.
What values must you be given in order to complete Law of Cosines?
a)
AAA
b)
SAS
c)
Either SAS or SSS
d)
AAS or SSA
7.
If you are given SAS what value are you trying to find if you use the Law of Cosines?
a)
The smallest angle
b)
The remaining side
c)
the largest angle
8.
Angle A= 54°
Side b= 19
Side c= 21
What is Side a?
Side b= 19
Side c= 21
What is Side a?
a)
a²=19²+21²-2(19∙21)∙cos(54)
b)
a²=21²-19²+2(21∙19)∙cos(76)
9.
After finding x what is the easiest next step?
a)
Use Law of Cosines again
b)
Triangle sum theorem
c)
I don't know
d)
Use Law of Sines to find the remaining angles
10.
What is the answer to side a
a)
14.51
b)
61.73
c)
28.89
11.
Which is NOT an equation to find the area of a triangle
a)
K= ½baSin(C)
b)
K=½a² (sin(B))∙(sin(C)) ∕ sin(A)
c)
K=2ac ¼sinB
12.
Which equation would you use to find the area of the triangle ABC
a=12
b=15
c=9
a=12
b=15
c=9
a)
(√s(s-a)(s-b)(s-c))
b)
K=1/2a²(sinBsinC/sinA)
13.
What is the area of JKL if
j=45.7
L=27.3°
K= 111.1°
j=45.7
L=27.3°
K= 111.1°
a)
549.8 u²
b)
K=243.3 u²
c)
K=673.01 u
d)
K=673.01 u²
14.
What is the area of ABC if
a=4.7
c=12.4
B=47.33°
a=4.7
c=12.4
B=47.33°
a)
21.43 u²
b)
17.57 u²
c)
85.01 u²
15.
What is the answer to ABC if
a=15
b=9
c=7
a=15
b=9
c=7
a)
15.97 u²
b)
20.69 u²
c)
21 u²
16.
If you have triangle ABC what is the side b if you have
b=x
B=71°
a=17
A=54°
b=x
B=71°
a=17
A=54°
a)
19.87
b)
19.96
c)
21.3
17.
If you have triangle ABC what is angle C if you are given
B=13°
b=91
A=54°
B=13°
b=91
A=54°
a)
129
b)
161
c)
113
18.
In triangle ABC what is angle A if you are given
a=9
b=12
c=4°
a=9
b=12
c=4°
a)
39.4°
b)
38.7
c)
35.9
19.
What is the area of triangle ABC if
a=9
b=12
c=14
a=9
b=12
c=14
a)
53.6 u
b)
K= 65.3 u²
c)
K=97.5 u²
d)
K=53.6 u²
20.
In triangle ABC what is side b if
a= 31
B= 27°
c= 81
a= 31
B= 27°
c= 81
a)
63.31
b)
17.38
c)
69.69
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