R ( a+b, c)
S (a, 0)
1) Examining the picture, we can sketch out and state the following noticing that point P and R are on the same line, and Point T and S are on the same line either.
2) Since P and R are on the same line, they share the y-coordinate so we can write out: P(b, c) and R ( a+b , c)
Similarly, T and S are on the same line so S(a, 0) for point S does not have " height". So they share the y-coordinate as well.
Note that a is from the origin to point a.
So to find out the x-coordinate from R we need to add to the x-coordinate form S, the same distance from the origin to P. So
R( a+b, c) for the sides of a parallelogram are congruent.
3) Hence, the answer is:
R ( a+b, c)
S (a, 0)