Figure EFGH on the grid below represents a trapezoidal plate at its starting position on a rotating surface:

The plate is rotated 90° about the origin in the counterclockwise direction. In the rotated trapezoid, what are the coordinates of the endpoints of the side congruent to side FG?

Question

Figure EFGH on the grid below represents a trapezoidal plate at its starting position on a rotating surface:

The plate is rotated 90° about the origin in the counterclockwise direction. In the rotated trapezoid, what are the coordinates of the endpoints of the side congruent to side FG?

hansc · Answer

(5, 7) and (3, 4)
 (−5, −7) and (−3, −4)
 (−5, −7) and (−8, −4)