contestada

Parallel, intersecting or skew?
AB and BC.
AE and BF.
EF and AD.
Plane ABC and Plane ABF.
Plane AED and Plane BFC.
HELP!!!

Parallel intersecting or skew AB and BC AE and BF EF and AD Plane ABC and Plane ABF Plane AED and Plane BFC HELP class=

Respuesta :

Two lines are:

  • Parallel if they don't intersect and lie on the same plane
  • Intersecting if...well, they intersect at one point
  • Skew if they don't intersect and they lie on two different planes

So, we have:

  • AB and BC intersect at point B
  • AE and BF don't intersect, but both lie on the plane AEFB
  • EF and AD don't intersect and don't lie on a common plane
  • ABC and ABF intersect on segment AB
  • AED and BFC are parallel (they're both perpendicular to plane ABC)