Free Geometry Help

GradeA offers free geometry help in various topics.  As always, our lessons focus on teaching students in a visual and easily understandable way. There are even some free math help videos to strengthen your understanding. Please view all of free geometry lessons, otherwise...

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Need to practice your geometry knowledge. GradeA now offers an entire geometry curriculum including detailed classroom notes, review sheets, and more - and it is absolutely free to print or download! NEW!


GradeA's Free Geometry Lessons

To learn over 100 geometry terms, view GradeA's geometry glossary.
Need help remembering all of this? Try this geometry formula sheet.
Foundational Geometry Topics    
The Three Undefined Terms in Geometry - Learn the about the building blocks of all geometry. Without these, everything else will be much more difficult!    
Three Basic Geometry Vocabulary Terms - the Segment, the ray, and the angle.  Learn these very important starting blocks for geometry, but make sure you know the undefined terms first.  
The Math Pie Symbol - Pi - Curious how pie is a part of math?  Take a look at our page on the famous Greek letter pi.  
Beginning Free Geometry Help Topics  
The Pythagorean Theorem - Perhaps the most famous of all the geometry topics. Do not miss GradeA's unique explanation.  
The Segment Addition Postulate - Learn the Segment Addition Postulate by breaking sticks. This activity really helps give the postulate meaning.  
Learn How To Measure Angles - An interesting lesson that uses the hands of a clock to demonstrate the different sizes of angles.  
Learn about Geometry and Triangles - Triangles are categorized by angles and by side lengths.  Definitions for acute, right, obtuse, scalene, isosceles, equilateral and equiangular are all given!  
Parallel Lines: Learn about parallel lines, transversals, and all of the special angles that are created, including corresponding angles, alternate interior angles, alternate exterior angles, and same-side interior & exterior angles.  
Special Right Triangles: 45-45-90 & 30-60-90. Learn how to solve for missing sides of these special triangles.  
Geometry Formulas - A series of important formulas that you will need to know for success in geometry.  Topics include, area, coordinate geometry, and right triangles.  
To download a comprehensive geometry formula sheet, please view these geometry formulas.
Circle Formulas- View the Video
Eulers Formula: Relates the faces, edges, and vertices of polyhedron.
Additional Free Geometry Help Topics
Transformation Geometry - Learn about translation, reflections and rotations.
Tangent - Learn the basic definition of a tangent line
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More Valuable Geometry Resources from GradeA

Because we encourage visual learning so much in geometry, GradeA highly recommends the The Geometer's Sketchpad:  A highly affordable program that is a must have for all geometry learners.  


To see how effective the Geometer's Sketchpad can be, take a look at our Geometer's Sketchpad Tutorial - an interactive video that teaches the three undefined terms of geometry, as well as the basic functions of the program. 

GradeA offers plent more than just free geometry help:

Free fraction help, free algebra help or return to the GradeA homepage.



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