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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
Monday
Apr 29 - Oct 21 |
7:30 - 9:00 PM ET
Apr 29 - Oct 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 |
Andrew Sayler |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
CLOSED
With Books $755
|
Tuesday
May 14 - Oct 22 |
7:30 - 9:00 PM ET
May 14 - Oct 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 |
Eli Brottman |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
Friday
May 24 - Nov 8 |
7:30 - 9:00 PM ET
May 24 - Nov 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 |
Achilleas Sinefakopoulos |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
Sunday
Jun 23 - Dec 15 |
7:30 - 9:00 PM ET
Jun 23 - Dec 15
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 |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
Tuesday
Jun 25 - Dec 10 |
7:30 - 9:00 PM ET
Jun 25 - Dec 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 |
Christian Hokaj |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
Wednesday
Jul 17 - Jan 15 |
7:30 - 9:00 PM ET
Jul 17 - Jan 15
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 |
Achilleas Sinefakopoulos |
$690
(~$29/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
Sunday
Aug 18 - Feb 23 |
7:30 - 9:00 PM ET
Aug 18 - Feb 23
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/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
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/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
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/week)
$755 w/books
|
$690
(~$29/week)
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/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
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/week)
$755 w/books
|
$690
(~$29/week)
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/week)
$755 w/books
|
$690
(~$29/week)
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/week)
$755 w/books
|
$690
(~$29/week)
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/week)
$755 w/books
|
$690
(~$29/week)
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/week)
$755 w/books
|
$690
(~$29/week)
ENROLL
With Books $755
|
AoPS Holidays
There are no classes May 25 ‐ 27, July 4, August 30 ‐ September 2, October 31, November 25 ‐ December 1, and December 21, 2024 ‐ January 3, 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
Lesson 1 | Angles |
Lesson 2 | Triangle Angles and Congruent Triangles |
Lesson 3 | Isosceles & Equilateral Triangles, Perimeter, and Area |
Lesson 4 | Similar Triangles |
Lesson 5 | Similar Triangles and Right Triangles |
Lesson 6 | More Right Triangles! |
Lesson 7 | Special Parts of a Triangle |
Lesson 8 | Special Parts of a Triangle, Continued! |
Lesson 9 | Quadrilaterals |
Lesson 10 | More Quadrilaterals |
Lesson 11 | Polygons |
Lesson 12 | Geometric Inequalities |
Lesson 13 | Introduction to Circles |
Lesson 14 | Circles and Angles |
Lesson 15 | Tangents |
Lesson 16 | Power of a Point |
Lesson 17 | 3D Geometry Part 1 |
Lesson 18 | 3D Geometry Part 2 |
Lesson 19 | Transformations |
Lesson 20 | Analytic Geometry |
Lesson 21 | More Analytic Geometry |
Lesson 22 | Basic Trigonometry |
Lesson 23 | Problems! |
Lesson 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 |