The figure below is a rectangular box in which EFGH and ABCD are rectangles and BF overbar BF is perpendicular to planes EFGH and ABCD.

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The figure below is a rectangular box in which EFGH and ABCD are rectangles and BF overbar BF is perpendicular to planes EFGH and ABCD.
The figure below is a rectangular box in which EFGH and ABCD are rectangles and BF overbar BF is perpendicular to planes EFGH and ABCD.
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  • Description

The figure below is a rectangular box in which EFGH and ABCD are rectangles and BF overbar is perpendicular to planes EFGH and ABCD.

Use the figure to complete parts a through d.

A rectangular box has rectangular bases A B C D and E F G H. The following edges are perpendicular to the bases: A E; B F; C G; D H. Rectangle B D H F is inside the rectangular box.HGFEABCD

a. What is the intersection of

ModifyingAbove CG with left right arrow

and plane

ABC​?

b. Which pair of planes are​ perpendicular?

c. Which lines are perpendicular to plane

CDG​?

d. What is the measure of the dihedral angle

Upper D dash GH dash Upper F​?