Answer:
A = 400cm^2
Step-by-step explanation:
A=2[tex]A_{B}[/tex]+(a+b+c)h
[tex]A_{B}[/tex] = [tex]\sqrt{s (s-a) (s-b) (s-c) }[/tex]
s = [tex]\frac{a+b+c}{2}[/tex]
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]
A = 8·7 + 17·7 + 15·7 + [tex]\frac{1}{2}[/tex] [tex]\sqrt{-8^4+2(8x17)^2+2(8x15)^2-174+2(17x15)^2-15^4}[/tex]
A = 400cm^2
