Church steeple, Eiffel Tower, C.N. Tower,Electric poles, Egyptian pyramid,some tomb stones
In a tetrahedron all the triangles have to be congruent. In a Triangular Pyramid, the lateral faces are all congruent to each other, but not always with the base triangle. Not necessarily. The lateral faces need to be congruent if it is a right pyramid, not otherwise. The apex of the pyramid need not be directly above the centre (however defined) of the base. Think of a triangular pyramid doing an impersonation of the Leaning Tower of Pisa!
The Black Mountain Tower (also known as The Telstra Tower) is 195.2m tall.
The number of suicides that have occurred from the Eiffel Tower is unknown. Unfortunately, the management of the tower say the answer is too many to give a number. It is said the Eiffel Tower is the third most popular means of suicide in the country of France.
Nah, Abraham is a decendant of Shem. You can follow his bloodline in Genesis 11 after the tower of Babel story (obviously Abraham is still called Abram here).