Question

ABCD is QUADRILATERAL. Wa have( t ϵ IR*+). N,M and K 3 points. Such as :
(NK) ⃗=t(CB) ⃗ and (CN) ⃗=(1-t)(CD) ⃗ and (DM) ⃗=t(DA) ⃗
Prove that (ABC) // (MNK)

Answer 1

NK and CB and CN and CD and DM and DA are a vectors