Question-63900

Question Number 63900 by Rio Michael last updated on 10/Jul/19

Commented by Rio Michael last updated on 10/Jul/19

I n t h e D i a g r a m a b o v e A B C D a n d C D E F a r e p a r r a l l e l o g r a m s

w h i c h l i e i n t h e s a m e p l a n e .

A \vec{B} = p, B \vec{C} = q a n d C \vec{F} = r

b y c o n s i d e r i n g a r e a s h o w t h a t ∣ p \times (q + r) ∣ = ∣ p \times q ∣ + ∣ p \times r ∣