QP is (x y) = (3 -1) + r (14 10)

QR is (x y) = (3 -1) + s (17 -9)

PR is (x y) = (0 18) + t (5 -7)

where r, s, and t are scalars.

1. Use vector methods to find the coordinates of P, Q, and R.

2. Find vectors PQ and PR and evaluate PQ*PR

3. Find size of QPR

4. Find the area of triangle PQR

asked by

**John**