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Online calculator. Triangle area. Heron's formula.

Triangle

If

a, b
and
c
is lengths of triangle sides then area of triangle ABC can be found using the Heron's formula:

A = √
p
(
s - a
)(
s - b
)(
s - c
)

where
s
is the semiperimeter, or half of the triangle's perimeter

s
a
+
b
+
c
2

This free online calculator will help you to find the area of a triangle from sides.

To find triangle area from the lengths of the sides

Input lengths of triangle sides:
a
=
b
=
c
=


You can input only integer numbers or fractions in this online calculator. More in-depth information read at these rules.





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