- Clockwise from top left, the 3 lines are labeled m, r, and s.
- Line m intersects both line r and line s.
- At the intersection of line m and line r, 1 angle is labeled clockwise from top left as follows:
- Top right: x°
- At the intersection of line m and line s, 1 angle is labeled clockwise from top left as follows:
- Bottom right: y°
- A note indicates the figure is not drawn to scale.
In the figure shown, lines and are parallel, and line intersects both lines. If , which of the following must be true?