Why do you add the angles/arguments when multiplying complex numbers in polar form?

Why don't you FOIL the terms?

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem

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

What type of symmetry does a rhombus have?