# 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*