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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
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Monday
Jun 16 - Dec 8 |
7:30 - 9:00 PM ET
Jun 16 - Dec 8
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 |
Radu Andrei Cebanu |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
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Friday
Jun 20 - Jan 9 |
7:30 - 9:00 PM ET
Jun 20 - Jan 9
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 |
Andrea Knapp |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
STARTING SOON |
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Sunday
Jun 29 - Jan 11 |
7:30 - 9:00 PM ET
Jun 29 - Jan 11
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Monday
Jul 14 - Jan 19 |
7:30 - 9:00 PM ET
Jul 14 - Jan 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 |
Mike Livergood |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Wednesday
Aug 13 - Feb 11 |
7:30 - 9:00 PM ET
Aug 13 - Feb 11
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 |
Jeffrey Hankins |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Tuesday
Aug 26 - Feb 24 |
7:30 - 9:00 PM ET
Aug 26 - Feb 24
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Sunday
Sep 7 - Mar 8 |
7:30 - 9:00 PM ET
Sep 7 - Mar 8
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 |
Annie Meyers |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Thursday
Sep 11 - Mar 12 |
7:30 - 9:00 PM ET
Sep 11 - Mar 12
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
Wednesday
Sep 24 - Mar 25 |
7:30 - 9:00 PM ET
Sep 24 - Mar 25
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 |
Dylon Chow |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
|
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 |
$710
(~$30/lesson)
$775 w/books
|
$710
(~$30/lesson)
ENROLL
With Books $775
|
AoPS Holidays
There are no classes July 4 ‐ 6, August 29 ‐ September 1, October 31, November 24 ‐ November 30, December 20 ‐ January 2, and May 23 ‐ 25, 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 |
