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.
Soluble fibre. Soluble fibre can be digested by your body. It may help to reduce the amount of cholesterol in your blood. If you have constipation, gradually increasing sources of soluble fibre â such as fruit and vegetables, oats and golden linseeds â can help soften your stools and make them easier to pass. Foods that contain soluble fibre include: 1  oats, barley and rye.