Question

Vector PQ = <-3,1,-2>
Vector PR = <1,-1,1>

PQ x PR = ????

Answer 1

is that a cross-product?

Answer 2

PQxPR = <-1, 1, 2>

Answer 3

yes

Answer 4

http://www.youtube.com/watch?v=qsgK1d-_8ik

Answer 5

(b) Find the area of the triangle PQR.

Answer 6

(a) Find a nonzero vector orthogonal to the plane through the points P, Q, and R. Was the first question... but thats the cross product im sure.

Answer 7

squareroot(6)/2

Answer 8

need the points of p q r to do a)

Answer 9

I used P Q R to find vector PQ and vector PR... to find part a i just needed to find the cross product... can you show me the steps please???

Answer 10

you answer is correct.

Answer 11

ok cwoool

Answer 12

your****