The coordinates of the quadrilateral
A(5,6)
B(10,6)
C(8,1)
D(3,1)
Part A.
The rule for a rotation counterclockwise of 180°

A'=(-5,-6)
B'=(-10,-6)
C'=(-8,-1)
D'=(-3,-1)
Then we will draw the quadrilateral
the original is the red
and the rotate is the blue
Part B
the coordinate change as the given rule seen previously for rotation of 180° counterclockwise
