Calculation: KZOR2l - 1

S__lat =
2* ( a* b+ b* c+ a* c)

S__lat = 2* ( a* b+ b* c+ a* c) $S_{lat}$ = $2\cdot (a\cdot b+b\cdot c+a\cdot c)$

S__lat = 2* a* b+ 2* b* c+ 2* a* c $S_{lat}$ = $2\cdot a\cdot b+2\cdot b\cdot c+2\cdot a\cdot c$