Question 1

How is the area calculated from 3 sides?

Accepted Answer

Using Heron's formula: Area = sqrt(s(s-a)(s-b)(s-c)) where s = (a+b+c)/2 is the semi-perimeter.

Question 2

What inputs are needed?

Accepted Answer

You need at least 3 values: either 3 sides (SSS), 2 sides + 1 angle (SAS/SSA), or 1 side + 2 angles (ASA/AAS).

Question 3

Does it detect triangle type?

Accepted Answer

Yes. It identifies equilateral, isosceles, or scalene triangles, and whether they are acute, right, or obtuse.

Question 4

What if the inputs cannot form a valid triangle?

Accepted Answer

The calculator validates using the triangle inequality theorem and shows an error if the inputs are invalid.

Question 5

Is my data stored anywhere?

Accepted Answer

No. All calculations happen in your browser. No data is sent to any server.

Triangle Calculator

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