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Area of a triangle =1/2xbasexheight
perimeter of a triangle = sum of all three sides
            Pythagorus theorum
The square of the hypotenuse  is equal to  the sum of the squares of the other two sides.
  hyp² = base² + height²
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AREA OF A TRIANGLE = \frac{1}{2} base* height

PERIMETER = sum of all the three sides 


where c is hypotenuse and a and b are other two sides

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