parallel planes, lines and skew lines
Use the 3D diagram to answer the following questions.
1. Name the green plane two different ways. 2. Name the pink plane. 3. What is the intersection of line BH and line AG? 4. Are points G and H collinear? 5. Are points E, F and B coplanar? 6. What is the intersection of plane AGH and line CD? 7. Why is "plane AHB" a bad name for the green plane? 8. Name three lines that are skew to line CD. 9. Name a pair of parallel lines. 10. Are line AB and EF coplanar?