Answer:
960
Step-by-step explanation:
(if i made any typos, sorry it is kind of hard to type on computer over writing on paper.)
A=2AB+(a+b+c)h
AB=s(s﹣a)(s﹣b)(s﹣c)
s=(a+b+c)/2
Solving forA
A=ah+bh+ch+1/2 sqrt(﹣a^4+2(ab)^2+2(ac)^2﹣b4+2(bc)^2﹣c^4)=10·12+24·12+26·12+1
2·﹣104+2·(10·24)2+2·(10·26)2﹣244+2·(24·26)2﹣264=960
