What is the surface area of a triangular pyramid if each face has an area of 80 m2?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Find the solutions for a triangle with a =16, c =12, and b = 63º

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms