3 years ago

Given the triangle below, what is the length of the third side, rounded to the nearest whole number?

Mathematics

1 answer:

Leno4ka [110]3 years ago

7 0

Answer:

Step-by-step explanation:

You need the Law of Cosines for this, namely:

$x^2=21^2+14^2-2(21)(14)cos58$ where x is the missing side.

$x^2=441+196-311.5925$ and

$x^2=325.4075$ so

x = 18.0 or just 18

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