Answer:
[tex]=132[/tex]
Step-by-step explanation:
[tex]A=2AB+(a+b+c)h[/tex]
[tex]AB=\sqrt{s(s-1)(s-b)(s-c)}[/tex]
[tex]s=\frac{a+b+c}{s}[/tex]
Now we have to solve for A:
[tex]A=ah+bh+ch+\frac{1}{2}\sqrt{-a^{4}+2(ab)^2+2(ac)-B^4(bc)^2-c^4[/tex]
[tex]4*10+3*10+5*10+\frac{1}{2}*\sqrt{-4^4+2*(4*3)^2*(4*5)^2-3^4+2*(3*5)^2-5^4}[/tex][tex]=132[/tex]
