The area of the triangle of base (b) and a height (h) is A
[tex]A=\frac{1}{2}\cdot b\cdot h[/tex]Given: b = 17 feet and h = 6 feet
So, the area will be :
[tex]A=\frac{1}{2}\cdot17\cdot6=17\cdot3=51ft^2[/tex]so, the answer is : the area of the triangle = 51 square feet.