Answer:
4.5
Step-by-step explanation:
triangular prism volume = [tex]\frac{1}{4}[/tex]h[tex]\sqrt{-a^{2}+2(ab)^{2} +2(ac)^{2}﹣b^{4}+2(bc)^{2}﹣c^{4} }[/tex]
a = base side = 1.4 ft (after converted from inches to feet)
b = base side= 2 ft
c = base side = 2.5 ft
h = height = 3 ft
plug all the number into the formula
