Amount of material =area area of triangle=1/2 times base tiems ehighte
base=2 and 1/4 height=8 and 1/2 convert all to imporpoert 2 and 1/4=2+1/4=8/4+1/4=9/4 8 and 1/2=8+1/2=16/2+1/2=17/2 so we have area=1/2 times 9/4 times 17/2 area=(1 times 9 times 17)/(2 times 4 times 2) area=153/16 area=9 and 9/16
