Surface Area of a Rectangular Pyramid. The surface area of a regular square pyramid is the sum of area of the base and area of four isosceles triangles. But for rectangular pyramid, with rectangular base, we can not use the standard formula of surface area because there is more than one slant height ($s_1$ and $s_2$).
Flaxseeds. Another food to help relieve constipation is flaxseeds. Flaxseeds are rich in fiber and essential fatty acids, healthy fats that soften stool and ease constipation. The best way to use flaxseeds as a stool softener is to add approximately 2 tablespoons of flaxseed to your cereal or meals.
Daily use of stool softeners? I often heard in rehab (and see suggested on here) that taking stool softeners daily can greatly help with stool firmness for us in the SCI population. Recently I was reading the directions on the bottle (go figure), and it says that taking one or two tablets should induce a bowel movement in around 12 hours.