# How to calculate triangle sides

These can be very helpful when you're stuck on a problem and don't know How to calculate triangle sides.

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## Calculating lengths of triangle sides (Pythagorean)

These are the four steps to follow: Step 1 Find the names of the two sides we are using, one we are trying to find and one we already know, out of Opposite, Adjacent and Hypotenuse. Step 2 Use SOHCAHTOA to decide which one of

## Sides of Triangle

Sine θ = Length of opposite side/Length of Hypotenuse side Cos θ = Length of Base side/Length of Hypotenuse side Tan θ = Length of Perpendicular side/Length of Base side Using Perimeter

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## How to Calculate the Missing Sides and Angles of Triangles

Given two triangle sides and one angle If the angle is between the given sides, you can directly use the law of cosines to find the unknown third side, and then use the formulas above to find the missing angles, e.g. given a,b,γ:

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## Right Triangle Calculator

How To Use Sides of a Triangle Formula? Step 1: Check for the type of triangle. Step 2: Check for any known sides or angles. Step 3: Put the given values in the sides of a triangle formula: Sine

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