Find the perimeter of a rectangle if three of its vertices are (5,-2), (-3, -2), and (-3, 3).

Question

Describe what you did to solve each problem. Looking at the ordered pairs, did you see a correlation of the y-coordinate? Could you have solved this without graphing? If so, how?

Answer 1

(5,-2), (-3, -2), and (-3, 3)

First two ordered pairs have the same  y-coordinate

This shows one side of the rectangle is (5+3) =8 units

second and third ordered pairs have the same x- coordinate

The other side of the rectangle is (2+3) =5 units

L=8 units     , W=5 units

p=2(8+5)=26 units