These lessons, with videos, examples and step-by-step solutions, help SAT students review geometric notations.

**Related Pages**

More SAT Math Lessons

More SAT Test Prep

More Geometry Lessons

Geometry Worksheets

Geometry Games

The following diagrams show some geometric notations: point, line, line segment, ray, angle, intersecting lines, perpendicular lines, parallel lines. Scroll down the page for examples and solutions.

A point has no size; its only function is to show position. We use a single capital letter to name a point.

A line can be used to connect two points. A ine is perfectly straight and continues without end in opposite directions. It has no thickness. We can name a line by picking any two points on the line.

The line passing through the points A and Bis denoted by |

Since the length of any line is infinite, we sometimes use part of a line called a line segment.

A ray is part of any line that extends without end in one direction.

A ray starting from point A and passing through B is denoted by |

A plane has length and width, but no height, and extends infinitely on all sides.

A plane |

**Geometry Lesson 1 - Building Blocks of Geometry**

Introduction to Geometry.

Objectives:

- Understand and identify the undefined terms point, line and plane.
- Define segment, ray, angle, collinear, intersect, intersection and coplaner.
- Investigate postulates about points, lines and planes.

**Basic Language and Notation of Geometry**

Lines, line segments, rays and points. A little bit about dimensions.

**Geometry - Points Lines Planes Space Notation - Part 1 of 2**

Intuitive Math Help.

Points, Lines, Line segment, Ray, Plane, Angles

**Geometry - Points Lines Planes Space Notation - Part 2 of 2**

Intuitive Math Help.

More about angles

**Point, Line, Plane**

This video explains and demonstrates the fundamental concepts (undefined terms)of geometry: point, line, plane.

**Point, Line, Plane, and Space - Geometry Help**

Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.