Obtuse scalene triangle with:
Sides: a = 3, b = 5, c = 7
Using Heron's formula, we calculate the area of the triangle as:
Area: A = 6.495
Perimeter: P = 15
Semi-perimeter: S = 7.5
Inradius: An incircle of a triangle is a tangent circle to each side. We calculate the radius of the incircle as follows:
Radius ==Area / Semi-perimeter
Radius ==6.495 / 7.5 ==0.866
