Răspuns :
Aria totala =4* Aria ΔABC=4*12√3=48√3 cm² as simple as that!!
b)
aria bazei=12√3=AB²√3/4
AB²=4*12=48
AB=√48=√(16*3)=4√3
inaltimea unuii tetraedru regulat= AB*√2/√3 (invatata pede rost)=4√3 *√2/√3=
=4√2=d(A, (BCD))
c)V= Aria bazei*inaltimea/3
V=12√3*4√2:3=12*4*√6/3=4*4*√6=16√6 cm³
b)
aria bazei=12√3=AB²√3/4
AB²=4*12=48
AB=√48=√(16*3)=4√3
inaltimea unuii tetraedru regulat= AB*√2/√3 (invatata pede rost)=4√3 *√2/√3=
=4√2=d(A, (BCD))
c)V= Aria bazei*inaltimea/3
V=12√3*4√2:3=12*4*√6/3=4*4*√6=16√6 cm³