Exactly one plane in each case.
Skew Lines. :)
Two walls or a wall and floor of a room intersecting.
2
wateva
Yes, two planes have intersected.
One.
Two lines in two intersecting planes can be parallel, intersecting, or skew.
Skew Lines. :)
the answer would have to be skew
A line, or intersecting planes.
Intersecting planes!
yes
Two walls or a wall and floor of a room intersecting.
A line. Unless the two planes are the same, in that case a plane.
2
wateva
The abdominopelvic region can be divided into four quadrants using the transverse and vertical planes intersecting at the umbilicus, and into nine regions using two transverse and two vertical planes intersecting at the midclavicular lines.