show-that-the-area-of-the-triangle-whose-vertics-area-0-0-0-x-1-y-1-z-1-x-2-y-2-z-2-is-1-2-y-1-z-2-y-2-z-1-2-

Question Number 49466 by munnabhai455111@gmail.com last updated on 07/Dec/18

s h o w t h a t t h e a r e a o f t h e t r i a n g l e w h o s e v e r t i c s a r e a (0, 0, 0), (x_{1}, y_{1}, z_{1}), (x_{2}, y_{2,} z_{2}) i s 1 / 2 (\sqrt{Σ {(y_{1} z_{2} - y_{2} z_{1})}^{2} .}