2014 · Q66
What is the number of pairs of perpendicular planes in a cuboid?
Elementary MathematicsMensuration
- A4
- B8
- C12
- DNone of the above
Explanation
C(6,2) = 15 pairs of faces minus 3 parallel pairs = 12 perpendicular pairs.
What is the number of pairs of perpendicular planes in a cuboid?
Explanation
C(6,2) = 15 pairs of faces minus 3 parallel pairs = 12 perpendicular pairs.