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Find the length a. a=?

Find the length a. a=?
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4 votes
Find the length a. a=?

Find the length a. a=?-example-1
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User Elbert
by
6.7k points

1 Answer

6 votes
cosine law
a²=b²+c²-2ab*cosA

a²=13²+11²-2*13*11*cos(108)≈378.37
a≈19.45
answered
User SteveR
by
7.6k points
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