Need Help?
Need help finding the right class? Have a question about how classes work?
Introduction to GeometryFundamentals of geometry, including angles, triangle similarity and congruence, complicated area problems, mastering the triangle, special quadrilaterals, polygons, the art of angle chasing, power of a point, 3-dimensional geometry, transformations, analytic geometry, basic trigonometry, geometric proof, and more. |
24 weeks |
| 24 weeks ARE YOU READY? DO YOU NEED THIS? SYLLABUS |
Schedule
|
Sunday
Oct 26 - Apr 26 |
7:30 - 9:00 PM ET
Oct 26 - Apr 26
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Carlos Bovell |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
CLOSED
With Books $800
|
|
Monday
Nov 3 - May 4 |
7:30 - 9:00 PM ET
Nov 3 - May 4
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Grace Unger |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
CLOSED
With Books $800
|
|
Friday
Dec 5 - May 29 |
7:30 - 9:00 PM ET
Dec 5 - May 29
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Orianne Luo |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Monday
Jan 5 - Jun 22 |
7:30 - 9:00 PM ET
Jan 5 - Jun 22
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Caleb Bilenkin |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Sunday
Jan 25 - Jul 19 |
7:30 - 9:00 PM ET
Jan 25 - Jul 19
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Ana Malagon |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Wednesday
Feb 11 - Jul 22 |
7:30 - 9:00 PM ET
Feb 11 - Jul 22
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
David Reynoso Valle |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Thursday
Mar 5 - Aug 13 |
7:30 - 9:00 PM ET
Mar 5 - Aug 13
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Sindi Sabourin |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Sunday
Mar 22 - Sep 20 |
7:30 - 9:00 PM ET
Mar 22 - Sep 20
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Christian Hokaj |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
|
Tuesday
Apr 21 - Sep 29 |
7:30 - 9:00 PM ET
Apr 21 - Sep 29
7:30 - 9:00 PM Eastern 6:30 - 8:00 PM Central 5:30 - 7:00 PM Mountain 4:30 - 6:00 PM Pacific Click here to see more time zones |
Marco Figueroa Ibarra |
$735
(~$31/lesson)
$800 w/books
|
$735
(~$31/lesson)
ENROLL
With Books $800
|
AoPS Holidays
There are no classes December 20 ‐ January 2, May 23 ‐ 25, July 3 ‐ 5, September 5 ‐ 7, October 31, and November 23 ‐ 29 2026.
Who Should Take?
This is the most challenging of our Introduction series of classes. We recommend that students complete our Introduction to Algebra B course, or are able to pass the Introduction to Algebra B post-test, prior to taking Introduction to Geometry.Lessons
| 1 | Angles |
| 2 | Triangle Angles and Congruent Triangles |
| 3 | Isosceles & Equilateral Triangles, Perimeter, and Area |
| 4 | Similar Triangles |
| 5 | Similar Triangles and Right Triangles |
| 6 | More Right Triangles! |
| 7 | Special Parts of a Triangle |
| 8 | Special Parts of a Triangle, Continued! |
| 9 | Quadrilaterals |
| 10 | More Quadrilaterals |
| 11 | Polygons |
| 12 | Geometric Inequalities |
| 13 | Introduction to Circles |
| 14 | Circles and Angles |
| 15 | Tangents |
| 16 | Power of a Point |
| 17 | 3D Geometry Part 1 |
| 18 | 3D Geometry Part 2 |
| 19 | Transformations |
| 20 | Analytic Geometry |
| 21 | More Analytic Geometry |
| 22 | Basic Trigonometry |
| 23 | Problems! |
| 24 | More Problems! |
Required Textbook
|
Introduction to Geometry
A full course in challenging geometry for students in grades 7-10, including topics such as similar
triangles, congruent triangles, quadrilaterals, polygons, circles, funky
areas, power of a point, three-dimensional geometry, transformations, introductory trigonometry, and
more.
Related course: Introduction to Geometry |
