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Incircle of a triangle

This online calculator determines the radius and area of the incircle of a triangle given the three sides

Incircle triangle.gif

Another triangle calculator, which determines radius of incircle
Well, having radius you can find out everything else about circle.
Radius can be found as:
R = \frac {S}{p}
where, S, area of triangle, can be found using Hero's formula, p - half of perimeter.

PLANETCALC, Incircle of a triangle

Incircle of a triangle

Digits after the decimal point: 2
Incircle radius
Incircle area
Triangle area
Area ratio