In 3-Dimensional Space
3D Test: Next Tuesday or Wednesday
Lines
• Any 2 points can make a line
• Intersection of 2 lines is a point or
the same line
• A plane and a line not in the plane
intersect in 1 point
Planes
• Goes on forever in 2 dimensions
• Contains many lines/points
• Any 3 noncollinear points (not on the
same line) make a plane
• Intersection of 2 planes is a line or the
same plane.
• Coplanar means on the same plane.
Planes
• 3 planes may intersect at a point, line, 2
lines, 3 lines, be the same plane, or not
intersect
Solution is a
point.
No
solution.
Solution
is a line.
No
solution.
No
solution.
This is called isometric graph paper. I
have this paper on my teacher page. It
makes graphing 3-d coordinates much
easier….go online and print some off 
Z
We will be graphing tomorrow!
X
Y
Homework
• 3D Intro. Worksheet