Răspuns :
diagonala are formula √2l² +h², unde l = latura bazei iar h= inaltimea prismei.
Intr-n paralelipiped dreptunghic,
d²=L²+l²+h²
Prisma patrulatera regulata are L=l, deci d²=2·l²+h²
d²=L²+l²+h²
Prisma patrulatera regulata are L=l, deci d²=2·l²+h²