0Basic properties of lines and planes:
1. One and only one line passes through two distinct points.
2. Infinite number of lines pass through a given point. These lines are called concurrent lines.
3. The intersection of two distinct lines is a point.
4. Three or more points are said to be collinear if they lie on a line, otherwise they are said to be non collinear.
5. There are infinite number of planes passing through any given lines.
6. There is exactly one plane passing through three non - collinear points.
7. The intersection of two planes is a line.
8. If two lines are perpendicular to the same line they are parallel to each other.
