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
Sep 29 - Mar 30 |
1:00 - 2:30 PM ET –
Sep 29 - Mar 30
1:00 - 2:30 PM Eastern 12:00 - 1:30 PM Central 11:00 - 12:30 PM Mountain 10:00 - 11:30 AM Pacific Click here to see more time zones |
Judy Frank |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
CLOSED
With Books $755
|
Sunday
Oct 27 - Apr 27 |
7:30 - 9:00 PM ET
Oct 27 - Apr 27
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 |
Homero Gallegos |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
STARTING SOON MondayNov 11 - May 12 |
7:30 - 9:00 PM ET
Nov 11 - May 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 |
Jon Joseph |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Wednesday
Nov 13 - May 14 |
9:30 - 11:00 PM ET —
Nov 13 - May 14
9:30 - 11:00 PM Eastern 8:30 - 10:00 PM Central 7:30 - 9:00 PM Mountain 6:30 - 8:00 PM Pacific Click here to see more time zones |
Judy Frank |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Tuesday
Dec 10 - Jun 3 |
7:30 - 9:00 PM ET
Dec 10 - Jun 3
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 |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Wednesday
Jan 8 - Jun 18 |
7:30 - 9:00 PM ET
Jan 8 - Jun 18
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 |
Martha Maria Bernal Guillen |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Thursday
Jan 30 - Jul 10 |
7:30 - 9:00 PM ET
Jan 30 - Jul 10
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 |
Angel Bell |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Friday
Feb 14 - Aug 1 |
7:30 - 9:00 PM ET
Feb 14 - Aug 1
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 |
Ben S. |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Tuesday
Mar 4 - Aug 12 |
7:30 - 9:00 PM ET
Mar 4 - Aug 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 |
Julie Zhu |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Sunday
Mar 23 - Sep 21 |
7:30 - 9:00 PM ET
Mar 23 - Sep 21
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 |
Judy Frank |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
Wednesday
Apr 23 - Oct 1 |
7:30 - 9:00 PM ET
Apr 23 - Oct 1
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 |
Ben S. |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
AoPS Holidays
There are no classes October 31, November 25 ‐ December 1, December 21 ‐ January 3, May 24 ‐ 26, July 4 ‐ 6, and August 29 ‐ September 1, 2025.
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 |