Area of a Triangle — Heron's Formula
Heron's Formula: The area of any triangle with sides
a, b, c is
Area = √[s(s-a)(s-b)(s-c)]
where s = (a + b + c) / 2 is the semi-perimeter.
How to use: Drag the triangle's vertices A, B, C to change its shape. Use the controls to reset or randomize the triangle.
Try Challenge Mode to test your calculation skills!