The area of a parallelogram is base multiplied by height and therefore 18/2 and there you go.
under a rotation about the origin of 180°
a point (x, y ) → (- x, - y )
hence D is correct, both the x and y coordinates of the points on ΔA'B'C' have opposite signs from the corresponding points on ΔABC
Answer:
Step-by-step explanation:

Answer: 5(x-1)
Step-by-step explanation: