The coordinates of points P, Q, R and S are (–1, –2), (–2, 1), (1, 2) and (2, –1) respectively. The origin is the point O. 

a. Mark the points on a grid. Use equal scales on the two axes.

b. Write as column vectors:

a. O̅R̅_(vector)

b. R̅O̅_(vector)

c. Write as column vectors:

i. P̅R̅_(vector)

ii. Q̅S̅_(vector)

d. Write down the lengths of the vectors:

i. P̅Q̅_(vector)

ii. Q̅R̅_(vector)

iii. R̅S̅_(vector)

iv. S̅P̅_(vector)

e. Describe the quadrilateral PQRS.