Presentation on theme: "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."— Presentation transcript:
3 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.
4 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.
7 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.