Enter the three side lengths of a valid triangle. The calculator checks positivity and triangle inequality before computing the circumcircle.

1. Enter side lengths a, b, and c.
2. Verify the sides can form a triangle.
3. Read the circumradius, circumference, and circle area from the result card.

For a 3-4-5 triangle, Heron’s formula gives area 6, so the circumradius is 2.5.

The associated circumcircle has circumference 15.707963 and area 19.634954.

The calculator rejects impossible triangles instead of returning NaN or a negative circumradius.

Side lengths are treated as real numbers, so blank strings and malformed tokens are rejected before any geometry is performed.