?????????????????????????????? "altitiude" ??????????????????
thats teh Hite=22 inch
base=isosaleez triangel with eech side=9 inch
triangel area=base*hite/2
base=9
hite =9*sine(60 deg)=9* 0.866025403=7.794228634
area=35.07402885
volume=area*hite=35.07*22=771.6286348