Question

Aflati apotema, inaltimea, aria laterala si aria totala ale unui trunchi de piramida patrulatera regulata cu latura bazei mari de 20cm, latura bazei mici
de 4cm si muchia laterala de 17cm.

Answer 1

PB=80
Pb=16
AB=400
Ab=16
ne incadram in trapezul BB'C'C si aflam ap
ap=17√3
Al=(PB+Pb)*ap/2
Al=(80+16)*17√3/2
Al=96*17√3/2
Al=816√3
At=Al+AB+Ab
At=816√3+400+16
At=816√3+416
V=h/3(AB+Ab+√AB*Ab)
V=h/3(416+80)
V=h/3*496