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
Surface Area (Again) Thursday February 25, 2021
Finding numbers for two sides Thursday February 25, 2021
Geometry HW problem Thursday February 25, 2021
Finding the lenght of the missing base in a trapezoid. Wednesday February 24, 2021
Circle Geometry Question - Need Help Proving 2 Angles are Equal Tuesday February 23, 2021
Equations for double helix in parametric form Tuesday February 23, 2021
Determine the angle at the center, in radians. Tuesday February 23, 2021
Trigonometry: Graphs and Equations Monday February 22, 2021
Necessities for Electronics Monday February 22, 2021
Convex quadrilateral ABCD which AD=AB+CD Monday February 22, 2021