Find the perimeter of the polygon with the vertices A (−1, 1), B (4, 1), C (4,−2), and D(−1,−2).

Question

The perimeter of ABCD is ___ units.

Could someone explain how I can figure this out?

Answer 1

you could do a sketch

or use the distance formula four times

or look at coordinates
... the repetition of x and y values means vertical and horizontal lines
... this looks to be a rectangle

Answer 2

A polygon has vertices at -(1, 1),(1,-1), and (-1,-1)