为什么我无法打印结果？

I'm trying to make a print but the result is always 0.0 in 3 spaces that I have, I've been working in this but I can't find the reason, the first problem that I had, was that I was creating a new variable called perimetro and superficie, so I've tried using the variable that I've created in Figura Class but the problem is still thereI'm trying to make a print but the result is al