Calculating area of a triangle using the formula of Heron

The calculator below makes the calculation area of a triangle on the well-known formula of Heron.

Here is the formula itself:

where p - semiperimeter triangle:

If anyone is interested to learn more about Heron's formula, then you can easily do it on the page:

https://en.wikipedia.org/wiki/Heron's_formula

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Calculation square triangle at the formula Heron
Area triangle: