Lesson 1. undefined and defined terms in Geometry - Copy.pptx
1.
2. Undefined Terms
1. Point
- Indicator of a position
- It does not occupy an area
- It does not have any width, length, or depth
3. Undefined Terms
2. Line
- A collection of continuous points that extends
indefinitely in both directions
- it is usually denoted as a segment with arrows
on both ends
4. Undefined Terms
3. Plane
- A set of points contained in a flat surface and
extends indefinitely in all directions
- A plane is commonly denoted as a closed four-
sided figure
5. Defined Terms
1. Space
- is the set of all points
2. Collinear points
- points that lie on the same line
6. Defined Terms
3. Non-collinear points
- are points that do not lie on the same line
4. Coplanar points
- are points that lie in the same plane
7. Defined Terms
5. Non-coplanar points
- points that do not lie on the same plane
6. Coplanar lines
- are lines that lie on the same plane
7. Non-coplanar lines
- are lines that do not lie on same plane
