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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
Tuesday
Jan 5 - Jun 15 |
7:30 - 9:00
PM ET
Jan 5 - Jun 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 |
Martha Maria Bernal Guillen |
$595
$656 w/books
|
$595
FULL
With Books $656
|
Thursday
Jan 21 - Jul 1 |
7:30 - 9:00
PM ET
Jan 21 - Jul 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 |
Jon Joseph |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Sunday
Jan 24 - Jul 18 |
7:30 - 9:00
PM ET
Jan 24 - Jul 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 |
Dan Kneezel |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Friday
Feb 5 - Jul 16 |
7:30 - 9:00
PM ET
Feb 5 - Jul 16
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 |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Monday
Feb 8 - Aug 2 |
7:30 - 9:00
PM ET
Feb 8 - Aug 2
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 |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Wednesday
Feb 24 - Aug 4 |
7:30 - 9:00
PM ET
Feb 24 - Aug 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 |
Patrick Barringer |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Thursday
Mar 18 - Aug 26 |
7:30 - 9:00
PM ET
Mar 18 - Aug 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 |
Patrick Barringer |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Sunday
Apr 4 - Oct 3 |
7:30 - 9:00
PM ET
Apr 4 - Oct 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 |
Heather Finotti |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Monday
Apr 19 - Oct 18 |
7:30 - 9:00
PM ET
Apr 19 - Oct 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 |
Marcus Neal |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Friday
Apr 30 - Oct 8 |
7:30 - 9:00
PM ET
Apr 30 - Oct 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 |
$595
$656 w/books
|
$595
ENROLL
With Books $656
|
Summer 2021 | This course will be offered in Summer 2021. Click here to join our mailing list to be notified when the course schedule is available. |
AoPS Holidays
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
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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.
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