设底面边长为a,
侧棱与地面所成的正切为4/3,余弦值为3/5,√3/3a/11=3/5,a=33√3/5
h=44/5
V=1/3X1/2a√3/2aXh=11979√3/125
S=3X1/2X11X√(11^2-A^2/4)=363√73/20
设底面边长为a,
侧棱与地面所成的正切为4/3,余弦值为3/5,√3/3a/11=3/5,a=33√3/5
h=44/5
V=1/3X1/2a√3/2aXh=11979√3/125
S=3X1/2X11X√(11^2-A^2/4)=363√73/20