Vocabulary
A series of points that extends in two opposite directions without end.
Line
Can you have more than one line through two points?
No.
Draw four points that are collinear.
Draw three points that are non-coplanar.
Intersecting lines are _____ coplanar.
Always
Points that lie on the same line.
Collinear Points
True or False. If two lines intersect, then they intersect in exactly one point.
True
Draw three points that are non-collinear.
Name two planes that intersect at line BC. See figure 2.
Two planes _____ intersect in exactly one point.
Never
A flat surface that contains many lines and extends without end in the directions of all the lines.
Plane
Can two lines meet at more than one point?
No
Name line l in three different ways. See figure 1.
Shade the plane that contains the points G, F, and A. See figure 2.
Three points are ______ coplanar.
Always
Points and lines in the same plane.
Coplanar
When to planes intersect do they intersect at a point, a line or a plane?
A line.
Are points C, E, and D collinear? See figure 1.
Name the intersection of each pair of planes. Plane HCB and plane FEH. See figure 2.
A plane containing two points of a line ____ contains the entire line.
Always
A 2d representation of a 3d figure.
True or False. Three non-collinear points cannot lie on the same plane.
False, there is exactly one plane that three non-collinear points are on.
Are points F, A, and C collinear? See figure 1.
Shade the plane that contains the given points A, H, and G. See figure 2.
Four points are _____ coplanar.
Sometimes