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

• Completing the Square In Circle Equations
• Geometric Mean
• Geometric Terms
• Geometry Vocabulary

Formulas

• Area Formulas
• Perimeter Formulas
• Surface Area
• Volume Formulas

Other Stuff

• Important Geometry Vocabulary
• Geometry Tutoring
• Vertical Angles

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

Need help pls!!! Wednesday December 12, 2018
Attachment 10646 (https://www.freemathhelp.com/forum/attachment.php?attachmentid=10646)Attachment 10647

Help with this pls Tuesday December 11, 2018
Can anyone help me with this problem please?

Direction and speed control Monday December 10, 2018
Hi there. I'm soon starting a project where I need to describe the path of an object using 2d vectors. The object can change direction by altering the 'angle' of the vector, the vector will be

Vectors Problem Sunday December 09, 2018
Devon is holding his father's wheelchair on a ramp inclined at an angle of 20 degrees to the horizontal with a force of magnitude 2000 N parallel to the surface of the ramp. Determine the weight of

Whole Number Interior and Lengths Triangle - Does It Exist? Saturday December 08, 2018
Hi all I was wondering if someone could help with a strange Triangle problem. I am trying to determine whether or not there exists a triangle (right angle or otherwise) where the interior angles and