Question

Could someone help me with number 5 because I suck at perimeters

Answer 1

You might need to use the distance formula

for the distance betwen (x1,y1) and (x2,y2) is
$D= \sqrt{(x1-x2)^2+(y1-y2)^2}$

so find disance between (-3,1) and (-1,3)
and (-1,3) and (3,1)
so
if we did input them
we would get $6+2 \sqrt{2}+2 \sqrt{5}$ which is the peirmiter