 How To Calculate The Missing Side Length of a Triangle

With practice, finding a missing side in any triangle will become second nature!

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## How to Find the Missing Side Length Given Two Similar

Once you have identified what sides are given and which is missing, you can use the law to find out its length using some basic calculations.

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## Triangle missing side example (video)

For example, if you know all angles as well as two sides of a triangle, solving for the missing side is incredibly easy; all you need to do is plug your numbers into an equation and find the result.

## How to Find Missing Sides and Angles of a Right

To find the length of a missing side, familiarize yourself with the Law of Cosines which states that the length of one side in relation to another two is determined by a mathematical formula.
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