The points (-2, 3), (6, 7) and (4, 1) are the vertices of triangle ABC. If P is the mid-point of AB and Q is the mid-point of AC, then, PQ = ?
PQ = 1/2 BC
PQ = BC
PQ = 1/4 BC
PQ = 4BC
ABCD is a parallelogram in which P, Q, R and S are the mid points of sides AB, BC CD and DA respectively. Then,