Unit
Introductory Geometry
MA, Stanford University
Teaching in the San Francisco Bay Area
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If a triangle is right, then one leg squared plus the other leg squared equals the hypotenuse squared. First, identify the hypotenuse (easier said than done- it's the longest side, always across from the right angle.) Then set up your equation and solve for the variable. You will probably need to take a square root in your last step. The key idea is to make sure you set up the equation properly with the squares of the legs summing to the square of the hypotenuse.
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