Given quadrilateral PQRS with P(-4;1), Q(0;4),R(3:0)and S(-1;-3).
y
P(-4;1)
S(-1;-3)
4.1
Prove that PQRS is a rhombus.
4.2
Is PQRS a square? Justify your answer.
Q(0:4)
R(3:0)