Hello from MrBillDoesMath! 
 
Answer: 
 
 89 square meters
 
Discussion: 
The area of the figure is the area of the full rectangle minus the area of the triangle .
Rectangle area = 13 * 8 = 104
Triangle area = 1/2 bh = 1/2 ( 13 - 4 -4) * 6 = 1/2(5)*6 = 15
So the area of the figure - 104 = 15 = 89
 
Regards, 
 
MrB