V = (1/3)*S(ABCD)*H = || H =MO =AC/2 || = (1/3)*(1/2)AC*BD*AC /2 =
= (1/12)*AC²*BD .
V =(1/12)*38²*25 =(19²/3)*25 =(361/3)*25≈120*25 =30*4*25 =3000(cм³)
" решение " см приложение
V = (1/3)*S(ABCD)*H = || H =MO =AC/2 || = (1/3)*(1/2)AC*BD*AC /2 =
= (1/12)*AC²*BD .
V =(1/12)*38²*25 =(19²/3)*25 =(361/3)*25≈120*25 =30*4*25 =3000(cм³)
" решение " см приложение