Answer:
S(0,0)
Step-by-step explanation:
Polygons are named in either clockwise or counter-clockwise order. In this quastion it is a clockwise order.
there are 4 right angels.
since P starts (0,b) and the second point Q(a,0) is straight up the y-axis and R(0,-c) is straight along the x-axis, the point S must be over the same distance as R=0 and up the same distance as Q=0
that means S=(0,0)
I'm not sure because I haven't took this lesson before in school but I related it to somethings I hope it helps and good luck in your classes!!!!