Hm, it seems like his answer is off. The image is what I got.
If you want to find the volume, multiply the area of the base by the height. In this problem it would be 888*555, which is equal to 492,840
17/3. 5 times 3 is 15. Add the 2 from the numerator to get 17/3
(1) it can be both exterior of vertex or base. 180-130=50°
vertex is 50°: base=(180-50)/2=65°
base is 50°: vertex= 180-2*50=80°
vertex 50 base 65; vertex 80, base 50
(2)base=180-130=50°
vertex=180-2*50=80°
base 50 vertex 80