The figure below is a rectangular box in which EFGH and ABCD are rectangles a. What is the intersection of AE and plane ABC? and BF is perpendicular to planes EFGH and ABCD. Use the figure to complete parts a through d. OA. O O B. {A} A O C. {B} O D. {D} b. Which pair of planes are perpendicular? a. What is the intersection of AE and plane ABC? O A. ABE and CDG b. Which pair of planes are perpendicular? c. Which lines are perpendicular to plane EFG? O B. ADE and BCF d. What is the measure of the dihedral angle H-CD-B? O C. ABE and ADE O D. ABC and EFG c. Which lines are perpendicular to plane EFG? Select all that apply. A. AD OB. FG C. AE O D. DH d. What is the measure of the dihedral angle H-CD-B