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Explore points, lines, angles, triangles, circles, area, volume, and geometric proofs.
This Geometry course on Study Mondo covers 25 topics organized across 12 categories. Each topic includes detailed written explanations, worked examples, practice problems with step-by-step solutions, flashcards for review, and interactive lessons to help you master the material.
Points, Lines, and Angles
2 topics
Transformations and Congruence
5 topics
Triangles
7 topics
Take a diagnostic test covering all Geometry topics. Build a targeted study plan for your weak areas.
Jump into high-impact topics and keep your study momentum moving.
Quadrilaterals and Polygons
2 topics
Similarity
1 topic
Circles
2 topics
Right Triangle Trigonometry
1 topic
Area and Perimeter
1 topic
Circles
3 topics
Coordinate Geometry
0 topics
Three-Dimensional Geometry
1 topic
Solid Geometry
0 topics
Start with any category below, or jump to a specific topic that you need help with.
Perform translations, reflections, and rotations on the coordinate plane.
Prove triangles congruent using SSS, SAS, ASA, AAS, and HL.
Slide a figure across the coordinate plane using vectors and coordinate rules — the gentlest rigid transformation.
Flip a figure across a mirror line — the only basic rigid transformation that reverses orientation.
Turn a figure about a center point by a specified angle — preserves distance, angles, and orientation.
The sum of angles in a triangle
SSS, SAS, ASA, AAS, and HL theorems
Relationships in right triangles
AA, SAS, and SSS similarity theorems
45-45-90 and 30-60-90 triangles
Apply triangle inequality theorem
Medians, altitudes, and angle bisectors
Topics coming soon for this category!
Check back later for comprehensive study materials.
Topics coming soon for this category!
Check back later for comprehensive study materials.