Label the points, lines, and planes to show AB←→ and line j perpendicular to each other in plane R at point A, AB←→ both perpendicular to line l and intersecting line k at point B, and plane R intersecting plane S in line l.

Label the points lines and planes to show AB and line j perpendicular to each other in plane R at point A AB both perpendicular to line l and intersecting line class=