This picture depends entirely on space imagination. I can't draw and I don't know how to express it. The volume calculation of the pyramid in this figure is the base area * height /3, the base of the right triangle in the side view is the height of the base area calculation, and 2 in the front view is the base area calculation, so the base area is 2* 1/2= 1. From the right triangle in the side view, the bottom and back of the front view are vertical, so the height of the pyramid is the front view.