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Calculate Quantity of a Right Triangle

Right triangles are the foundation of trigonometry. This page will show you how to calculate just about anything dealing with right triangles. To use this page, do this:
  1. Type in anything you know (numbers only!) about your triangle into any relevant box as you have.

  2. Put a ? in the box of the item that you are trying to find.

  3. Click the "Go..." button.
This page will show you how to figure out what the box that you marked as "?" should be. 

       (hypotenuse - c)
       
      
°
(angle E)






(leg - b)






    °            
(angle D)          (leg - a)

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