# How to find the unknown length of a triangle

This trigonometry video tutorial explains how to calculate the missing side length of a triangle. Examples include the use of the pythagorean theorem, trigo

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## Calculating lengths of triangle sides (Pythagorean)

Step 1: Given a pair of similar triangles, determine which sides correspond to each other. The smallest side of the Step 2: Next, form the ratio of corresponding side lengths where one of

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## How to Solve for a Missing Right Triangle Length

Law of sines: the ratio of the length of a side of a triangle to the sine of its opposite angle is constant. Using the law of sines makes it possible to find unknown angles and sides of a

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## The Pythagorean Theorem

Use the Pythagorean theorem to solve for the missing length. Replace the variables in the theorem with the values of the known sides. 48 2 + 14 2 = c2. Square the measures and