Question

Plot the points P(1,5), Q(3,2), R(1,-1) and S(-1,2) on a xy plane and join them in order. Also find its area

Answer 1

Step-by-step explanation:

area=area of ∆PQR + area of ∆PSR

= 1/2×PR×QQ'+1/2×PR×SQ'

=1/2(5+1)(3-1)+1/2(5+1)(1+1)

=1/2×6×2+1/2×6×2

=6+6

=12

Answer 2

Step-by-step explanation:

Plot the points P(1,5), Q(3,2), R(1,-1) and S(-1,2) on a xy plane and join them in order. Also find its area