Question

show that the following four points froms a parallelogram:
(-2,-1),(1,0),(4,3),(1,2).

Answer 1

it can be solved using coordinate geometry
P(-2,-1). Q(1,0). R(4,3). S(1,2)
Join the diagonals
using distance formula
 √(x2 — x1)2 + (y2 — y1 )2

Answer 2

hence it forms parallogram