Introduction to Geometry Online Math Course
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Introduction to Geometry

Fundamentals 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

Diagnostics

ARE YOU READY? DO YOU NEED THIS?

Documents

SYLLABUS
24 weeks ARE YOU READY? DO YOU NEED THIS?  

Schedule

Friday
Sep 13 - Mar 13
7:30 - 9:00
PM ET
Sep 13 - Mar 13
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
$545
$606 w/books
$545
With Books $606
CLOSED
Sunday
Sep 15 - Mar 15
7:30 - 9:00
PM ET
Sep 15 - Mar 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
$545
$606 w/books
$545
With Books $606
CLOSED
Tuesday
Sep 24 - Mar 24
7:30 - 9:00
PM ET
Sep 24 - Mar 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
$545
$606 w/books
$545
With Books $606
CLOSED
Monday
Oct 7 - Apr 6
7:30 - 9:00
PM ET
Oct 7 - Apr 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
$545
$606 w/books
$545
With Books $606
CLOSED
Wednesday
Nov 13 - May 13
7:30 - 9:00
PM ET
Nov 13 - May 13
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
$545
$606 w/books
$545
With Books $606
ENROLL
Tuesday
Dec 3 - May 26
7:30 - 9:00
PM ET
Dec 3 - May 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
$545
$606 w/books
$545
With Books $606
ENROLL
Thursday
Dec 5 - May 28
7:30 - 9:00
PM ET
Dec 5 - May 28
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
$545
$606 w/books
$545
With Books $606
ENROLL
Tuesday
Jan 7 - Jun 16
7:30 - 9:00
PM ET
Jan 7 - Jun 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
$570
$631 w/books
$570
With Books $631
ENROLL
Thursday
Jan 23 - Jul 2
7:30 - 9:00
PM ET
Jan 23 - Jul 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
$570
$631 w/books
$570
With Books $631
ENROLL
Sunday
Feb 9 - Aug 2
7:30 - 9:00
PM ET
Feb 9 - 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
$570
$631 w/books
$570
With Books $631
ENROLL
Friday
Feb 28 - Aug 14
7:30 - 9:00
PM ET
Feb 28 - Aug 14
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
$570
$631 w/books
$570
With Books $631
ENROLL
Wednesday
Mar 11 - Aug 19
7:30 - 9:00
PM ET
Mar 11 - Aug 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
$570
$631 w/books
$570
With Books $631
ENROLL
Monday
Apr 13 - Oct 5
7:30 - 9:00
PM ET
Apr 13 - Oct 5
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
$570
$631 w/books
$570
With Books $631
ENROLL
Wednesday
Apr 29 - Oct 7
7:30 - 9:00
PM ET
Apr 29 - Oct 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
$570
$631 w/books
$570
With Books $631
ENROLL
Summer 2020This course will be offered in Summer 2020. Click here to join our mailing list to be notified when the course schedule is available.

AoPS Holidays

There are no classes November 25–December 1, December 21–January 3, May 23–25, July 3–5, and September 5–7.

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
By Richard Rusczyk
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.

I really enjoyed taking my first AoPS class. I always thought that online classes weren't very good. I was mistaken after I took this class. Not only did Introduction to Geometry help me become a better math student, it also helped me to think more abstractly and look for multiple roads to solve a problem. I enjoy the way the classroom is run and the pace was very nice. The class wasn’t boring at all. This class challenged me to become a better thinker and was way more challenging than regular school courses. I am also very glad that AoPS also included a little bit of a social aspect to math with the message boards. I made a lot of friends through this course. In school, I am always made fun of for being ahead of all of the other students. On AoPS I actually feel accepted for once because I can interact with kids that are more advanced than I am and also I learn from them. I will definitely take another AoPS class.

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