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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. Required Text: Introduction to Geometry	24 weeks Diagnostics ARE YOU READY? DO YOU NEED THIS? Documents SYLLABUS
24 weeks ARE YOU READY? DO YOU NEED THIS?

Schedule

Monday Jan 7 - Jun 24	7:30 - 9:00 PM ET Jan 7 - Jun 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	Achilleas Sinefakopoulos	$545 $606 w/books	$545 With Books $606
Friday Jan 25 - Jul 5	7:30 - 9:00 PM ET Jan 25 - Jul 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	Wendy Hou	$545 $606 w/books	$545 With Books $606
Wednesday Feb 6 - Jul 17	7:30 - 9:00 PM ET Feb 6 - Jul 17 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	Luis Ares	$545 $606 w/books	$545 With Books $606
Tuesday Feb 19 - Jul 30	7:30 - 9:00 PM ET Feb 19 - Jul 30 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	Miles Dillon Edwards	$545 $606 w/books	$545 With Books $606
Thursday Mar 7 - Aug 22	7:30 - 9:00 PM ET Mar 7 - Aug 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	Eric Wofsey	$545 $606 w/books	$545 With Books $606 ENROLL
Monday Apr 8 - Sep 30	7:30 - 9:00 PM ET Apr 8 - Sep 30 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	$545 $606 w/books	$545 With Books $606 ENROLL
Friday Apr 26 - Oct 4	7:30 - 9:00 PM ET Apr 26 - Oct 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	William (Billy) Swartworth	$545 $606 w/books	$545 With Books $606 ENROLL
Thursday May 16 - Oct 31	7:30 - 9:00 PM ET May 16 - Oct 31 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Wednesday May 29 - Nov 6	7:30 - 9:00 PM ET May 29 - Nov 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Friday Jun 14 - Nov 22	7:30 - 9:00 PM ET Jun 14 - Nov 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Monday Jun 24 - Dec 16	7:30 - 9:00 PM ET Jun 24 - Dec 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Wednesday Aug 14 - Feb 12	7:30 - 9:00 PM ET Aug 14 - Feb 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Thursday Aug 29 - Feb 27	7:30 - 9:00 PM ET Aug 29 - Feb 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	TBA	$545 $606 w/books	$545 With Books $606 ENROLL
Fall 2019	This course will be offered in Fall 2019. Click here to join our mailing list to be notified when the course schedule is available.

AoPS Holidays

There are no classes May 27, July 4, or September 2.

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.

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