ABCDA1B1C1D1-prisma patrulatera regulata
D1B-diagonala prismei
D1A-diagonala unei fete
Rz:
1)Aflam AB conform T. lui Pitagora:AB=5
2)Aflam BB1 la fel dupa pitagora : BB1=√119
3)Aflam Ab=a²=25
4)Aflam Al=4ab=20√119
5)At=2Ab+Al=50+20√119=10(5+2√119)
Rs:At=10(5+2√119)
coronitza