(41C) Area of Triangle (SSS)

[Albert Chan]

(11-10-2018 12:20 PM)Gamo Wrote:  Program to calculate the "Area of Triangle" with "given 3 sides"

To find the Area this program used the Heron's formula.

If the sides are sorted, a >= b >= c, Kahan's formula is more accurate.

Area Δ = 1/4 √((b+c+a)(b-a+c)(a-b+c)(b-c+a))

Try Kahan's example:
a,b,c = 100000, 99999.99979, 0.00029
True Area Δ ~ 9.9999999895