Figure efgh on the grid below represents a trapezoidal plate at its starting position on a rotating platform:

the plate is rotated 90° about the origin in the counterclockwise direction. which of the following describes the relationship of the paths traced by f and g as they undergo this rotation?

1. they form concentric circles.
2. they form congruent segments.
3. they form parallel segments.
4. they form perpendicular segments.