Answer:
#2 - The area of the triangular prism is 144 cm
Step-by-step explanation:
A = ah+bh+ch+[tex]\frac{1}{2}[/tex] · [tex]\sqrt{a^{4} +2(ab)^{2} +2(ac)^{2}-b^{4} +2(bc)^{2}-c^{4}[/tex]
=3 · 11+5 · 11+4 · 11+[tex]\frac{1}{2}[/tex] · [tex]\sqrt{- 3^{4} +2·(3x5)^{2} +2·(3 x 4)^{2} -5^{4} +2·(5 x 4)^{2} -4^{4}[/tex]
= 144
