Great Pyramid of Giza has a square base with a side length of 230.3m. The current perpendicular height of the pyramid is 138.5m. Assuming that the four triangles leaning together to make the shape are congruent, determine the height of these triangles that make up the sides of the pyramid.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.