**Area of Triangle with 3 Sides - Formula, Definition, Examples**
https://www.cuemath.com/measurement/area-of-triangle-with-3-sides/

We know that the formula that is used to find the area of a triangle with 3 sides is, Area =√ [s (s-a) (s-b) (s-c)], where 'a', 'b', 'c' are the three sides and 's' is the semi perimeter of the triangle. In this case, a = 8; b = 11, c = 13, and the semi-perimeter is, s = 8 + 11 + 13 = 32/2 = 16.

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