Answer:
c) 10 units
The length of side RT of the polygon RT = 10
Explanation:
Step(i):-
Given the coordinates of vertices R and T
R( -7 ,3) and T (3 ,3)
we have to find the length of side RT
We will use distance formula
RT =

Step(ii):-
RT


RT = √100
RT = 10
The length of side RT of the polygon RT = 10