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Home > MC2 > Chapter 11 > Lesson 11.3.1 > Problem 11-87


Think about the different three-dimensional vocabulary you learned in this lesson.

  1. Name two sets of geometric figures that can intersect to form a point.

    Two lines
    Three planes

  2. Is the face of a cube an example of a point, a plane (flat surface), or skew lines? Explain why it cannot be either of the other two.

    Point: a singular location in space.
    Plane: a flat surface.
    Skew lines: lines in space that do not interesect and are not parallel.

    The face of a cube has surface area.