The vertices of a rectangle are always: (x₁,y₁),(x₁,y₂),(x₂,y₂) and (x₂,y₁)
we have:
(x₁,y₁)=(3,3) ; x₁=3; y₁=3
(x₁,y₂)=(3,6); x₁=3; y₂=6
(x₂,y₂)=(7,6); x₂=7, y₂=6
The fourth vertex will be (x₂,y₁)=(7,3)
Answer:the fourth vertex of this rectanble will be: (7,3)
B*(3,6) C*(7,6)
A*(3,3) D*(7,3)
