Question

Prisma patrulatera regulata ABCDA'B'C'D'  are AA'=2 cm si volumul 16 cm3.Aflati aria laterala si masura unghiului planelor (ABC') si  (ABC). 

Answer 1

V=L*l*h=l*l*h=l*l*2
A=16
====> l*l=8 ----> l=2$\sqrt{2}$
Alat= 4l*h=4*2$\sqrt{2}$*2=16$\sqrt{2}$
<((ABC),(ABC`))=<(C`BC)=45