Heron's formula - practice problems - last page

The Heron's formula is used to calculate the area of a general triangle using the lengths of its sides. Heron's formula states that the area of a triangle whose sides have lengths a, b, and c is:
$S=\sqrt{s(s-a)(s-b)(s-c)}$, where $s=\frac{a+b+c}{2}$ is the semiperimeter (half perimeter) of the triangle .

Direction: Solve each problem carefully and show your solution in each item.

Number of problems found: 69

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See also our trigonometric triangle calculator. See also more information on Wikipedia.