Thread: Vector's Proof Question

Hello, I am new to this forum and I have a quick question about vectors:

PQRS is a quadrilateral where A, B, C and D are the midpoints of SP, PQ, QR and RS respectively. Prove, using vector methods, that ABCD is a parallelogram.

I was wondering if anyone could solve that and show me how they did it.

Originally Posted by SleepIsTheCousinOfDeath

Hello, I am new to this forum and I have a quick question about vectors:

PQRS is a quadrilateral where A, B, C and D are the midpoints of SP, PQ, QR and RS respectively. Prove, using vector methods, that ABCD is a parallelogram.

I was wondering if anyone could solve that and show me how they did it.

See here: http://www.mathhelpforum.com/math-he...rove-9401.html