Free Geometry Help
Need some geometry help? We have more than thirty excellent geometry lessons here, broken up in general topics. Make sure to browse all of the topics to find what you need, or search by keyword.
Graphing Lines
- Asymptotes
- Domain and Range
- Finding Asymptotes
- Finding Horizontal Asymptotes
- Point Slope Form
- Slope Intercept Form
- Slope of a Line
- X-Y Axis
- Graphing a Parabola
Shapes
- Triangles
- 30-60-90 Right Triangle
- Parallelograms
- Trapezoids
- Special Parallelograms
- Congruent Triangles
- Isosceles Triangles
- Polygons
Angles, Lines, and Points
- Distance Formula
- World of Angles
- Special Angles
- Parallel Lines
- Length of a Line Segment
- Sum of the Angles of a Triangle
- Exterior Angles of a Triangle
- Interior Angles of a Polygon
- Triangle Inequalities
- Midpoint Formula
More Lessons
Formulas
Other Stuff
Lessons from Other Sites:
- Areas, Volumes, Surface Areas
- Circumference of a Circle
- Classifying Angles
- Conic Sections/Circles
- Interior Angles of Regular Polygons
- Polygon Basics
- Pythagorean Theorem
- Three-Dimensional Figures
Recent Geometry Questions
Pretty basic Pythagorean & Trigonometry Tuesday November 12, 2019
The Movement of a Room in a 3 Dimensional Space / How ?! Tuesday November 12, 2019
How can I use an inscribed triangle to find the area of a circle? Tuesday November 12, 2019
Greatest and least possible values of the sides of a triangle?? Tuesday November 12, 2019
Finding area of square inscribed in a circle Tuesday November 12, 2019
Why does sin(x) = cos(90−x) and sin(90−x) = cos(x)? Tuesday November 12, 2019
I have to prove that one of triangles angles is 60° and that's, what i got as result. What does that mean? ? Monday November 11, 2019
Pipe Areas Monday November 11, 2019
Circle Theorem Monday November 11, 2019
Advance geometry - Transformation vs. motion Monday November 11, 2019