Triangle (Heron)
Math
Area14.7
Perimeter18
About the Triangle (Heron) calculator
Use this free Triangle (Heron) calculator. Enter side a, side b, side c and it shows area, perimeter instantly. With the default values, the area comes to 14.7.
How the Triangle (Heron) calculation works
With s = (a+b+c) ÷ 2, area = √(s(s−a)(s−b)(s−c)).
Tip: The two shorter sides must add up to more than the longest side, or no triangle exists.
Frequently asked questions
What does the Triangle (Heron) calculator do?
It takes side a, side b, side c and instantly calculates area, perimeter.
Is the Triangle (Heron) calculator free?
Yes. It is free, needs no signup and runs in your browser, so your numbers are not stored.
Which currency does it use?
Amounts are plain numbers, so use any currency consistently.
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