Шаг 1: Для случая 1 (a=3, b=4, c=5): p = (3+4+5)/2 = 6. S = sqrt(6*(6-3)*(6-4)*(6-5)) = sqrt(6*3*2*1) = sqrt(36) = 6.
Шаг 2: Для случая 2 (a=5, b=5, c=5): p = (5+5+5)/2 = 7.5. S = sqrt(7.5*(7.5-5)*(7.5-5)*(7.5-5)) = sqrt(7.5*2.5*2.5*2.5) = sqrt(117.1875) ≈ 10.825