1.   How many faces does an octahedron have?
    A. 8 B. 4
    C. 12 D. 6
    Hint

  2.   What is the locus of all points in a plane that are 3 units from a given point in that plane?
    A. circle of radius 9 units. B. segment of length 3 units.
    C. sphere of radius 3 units. D. circle of radius 3 units.
    Hint

  3.   What is the locus of all points in space that are 6 units from a given point?
    A. circle of radius 36 units.
    B. sphere of radius 6 units.
    C. circle of radius 6 units.
    D. sphere of radius 36 units.
    Hint

  4.   What is the locus of all points in a plane that are 7 units from the line in that plane?
    A. a line parallel to B. a plane parallel to
    C. a line perpendicular to D. two lines parallel to
    Hint

  5.   What is the locus of points in a plane that are less than 4 units from a given point in the plane?
    A. The interior of a sphere of radius 4.
    B. A circle of radius 4.
    C. A sphere of radius 4.
    D. The interior region of a circle of radius 4.
    Hint