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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
|
Thursday
Aug 29 - Mar 6 |
7:30 - 9:00 PM ET
Aug 29 - Mar 6
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 |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
CLOSED
With Books $755
|
|
Friday
Sep 6 - Mar 7 |
7:30 - 9:00 PM ET
Sep 6 - Mar 7
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
|
|
Tuesday
Sep 10 - Mar 11 |
7:30 - 9:00 PM ET
Sep 10 - Mar 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 |
Dylon Chow |
$690
(~$29/lesson)
$755 w/books
|
$690
(~$29/lesson)
ENROLL
With Books $755
|
|
STARTING SOON SundaySep 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)
ENROLL
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
|
|
Monday
Nov 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 |
