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Math Drills
Solving triangles
Law of cosines
Practice 1
Solving triangles
Law of cosines
1 / 5
Standard
In triangle ABC, find the length of side c.
a
=
5
,
b
=
8
,
C
=
60
∘
a = 5,\ b = 8,\ C = 60^{\circ}
a
=
5
,
b
=
8
,
C
=
6
0
∘
1
129
\sqrt{129}
129
2
7
7
7
3
69
\sqrt{69}
69
4
109
\sqrt{109}
109
Answer
