# Geometry Chapter 1-1. Geometry Chapter 1-1 Why do chairs sometimes wobble? What do the feet of a three legged stool represent? Points that lie in the.

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Geometry Chapter 1-1

Why do chairs sometimes wobble?
What do the feet of a three legged stool represent? Points that lie in the same plane. Why does a four legged chair sometimes wobble on a flat surface? One of the legs represents a point that doesn’t lie in the same plane as the other 3.

Key Terms A point is simply a location
A line is made up of points that has no thickness or width. Points that are on the same line are said to be collinear.

Terms cont… A plane is a flat surface made up of points.
Points that lie on the same plane are said to be coplanar. A plane has no depth and extends infinitely in all directions. Points are often used to name lines and planes.

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