Why do chairs sometimes wobble?. Have you ever noticed that a four legged chair sometimes wobbles, but a three- legged stool never wobbles?. Points, Lines and Planes. Section 1.1. Points. An undefined term in geometry. (explained using examples and descriptions.) They have no size
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
By using a dot
With a capital letter
Stars, Corner of the room
1. Using small script letter example: line t
2. Using any two points on the line –
Phone lines strung between poles, spider webs, sun beams.
Points that lie on the same line.
Points that do not fall on the same line.
1. Using a capital script letter – S
2. Using any three non-collinear points –
XYZ, XZY, YXZ, YZX, ZXY, ZYX
Points that lie on the same plane.
Points that do not lie on the same line.
1. Give two other names for .
Is a boundless three dimensional set of all points. Space can contain lines and planes.
As you look at the cube, the front face is on which plane?
The back face is on which plane?
The left face is on which plane?
The back and left faces of the cube intersect at?
Planes HGC and AED intersect vertically at?
What is the intersection of plane HGC and plane AED?
Use the diagram at right.
1. Name three collinear points.
2. Name two different planes that contain points C and G.
3. Name the intersection of plane AED and plane HEG.
4. How many planes contain the points A, F, and H?
5. Show that this conjecture is false by finding one counterexample: Two planes always intersect in exactly one line.
D, J, and H
planes BCGF and CGHD
Sample: Planes AEHD and BFGC never intersect.