LIVESTREAM GEO #123B: One Hard and two Easy from the Korea Winter Camp!
1:32:58
LIVESTREAM GEO #123B: One Hard and two Easy from the Korea Winter Camp!
LIVESTREAM GEO #123A: A Very Instructive Application of Sqrt(bc) Inversion!
1:24:07
LIVESTREAM GEO #123A: A Very Instructive Application of Sqrt(bc) Inversion!
LIVESTREAM GEO #122B: Two Hard Problems from Two Mock Geo Contests - We Didn't Solve Either!
1:22:27
LIVESTREAM GEO #122B: Two Hard Problems from Two Mock Geo Contests - We Didn't Solve Either!
LIVESTREAM GEO #122A: Using Symmetry to Prove a Radical Axis Bisects a Segment!
1:36:22
LIVESTREAM GEO #122A: Using Symmetry to Prove a Radical Axis Bisects a Segment!
LIVESTREAM GEO #121B: Turning One Problem Into a New One with Sqrt(bc) Inversion!
1:55:21
LIVESTREAM GEO #121B: Turning One Problem Into a New One with Sqrt(bc) Inversion!
LIVESTREAM GEO #121A: Finding the Right Application of Desargues!
1:03:39
LIVESTREAM GEO #121A: Finding the Right Application of Desargues!
LIVESTREAM GEO #120B: Two Triangles with the Same Orthocenter and Circumcenter!
1:15:33
LIVESTREAM GEO #120B: Two Triangles with the Same Orthocenter and Circumcenter!
LIVESTREAM GEO #120A: Two Problems from the Recently Released 2022 IMO Shortlist!
1:38:16
LIVESTREAM GEO #120A: Two Problems from the Recently Released 2022 IMO Shortlist!
LIVESTREAM GEO #119B: A Unique Solution by Reflecting a Poncelet Point!
1:23:38
LIVESTREAM GEO #119B: A Unique Solution by Reflecting a Poncelet Point!
LIVESTREAM GEO #119A: From the 2023 IMO (Problem 2)!
1:38:18
LIVESTREAM GEO #119A: From the 2023 IMO (Problem 2)!
LIVESTREAM GEO #118B: An Inversion with Respect to the Excircle!
1:25:04
LIVESTREAM GEO #118B: An Inversion with Respect to the Excircle!
LIVESTREAM GEO #118: A Nice Problem Involving Isogonal Lines and Similar Triangles!
1:37:00
LIVESTREAM GEO #118: A Nice Problem Involving Isogonal Lines and Similar Triangles!
LIVESTREAM GEO #117B: A Combination of Homothety and Pole/Polar!
1:25:44
LIVESTREAM GEO #117B: A Combination of Homothety and Pole/Polar!
LIVESTREAM GEO #117A: Yet Another Problem Involving Line IO, Solved with Vectors!
1:34:38
LIVESTREAM GEO #117A: Yet Another Problem Involving Line IO, Solved with Vectors!
LIVESTREAM GEO #116B: Lots of Parallel Lines and Ratios!
1:16:29
LIVESTREAM GEO #116B: Lots of Parallel Lines and Ratios!
LIVESTREAM GEO #116A: A Very Cool China TST Problem Involving the Line IO!
1:43:34
LIVESTREAM GEO #116A: A Very Cool China TST Problem Involving the Line IO!
LIVESTREAM GEO #115B: A Very Tough Anti-Steiner Point Problem!
55:40
LIVESTREAM GEO #115B: A Very Tough Anti-Steiner Point Problem!
LIVESTREAM GEO #115A: We Proved a Deep but Unnecessary Fact, then Solved the Original Problem!
2:04:48
LIVESTREAM GEO #115A: We Proved a Deep but Unnecessary Fact, then Solved the Original Problem!
LIVESTREAM GEO #114B: The Last Problem Was My Favorite!
1:33:29
LIVESTREAM GEO #114B: The Last Problem Was My Favorite!
LIVESTREAM GEO #114A: An Excellent Recent Problem from the Serbia IMO Team Selection Test!
1:25:50
LIVESTREAM GEO #114A: An Excellent Recent Problem from the Serbia IMO Team Selection Test!
LIVESTREAM GEO #113B: A Tricky Fixed Point Problem from an AoPS Geo Marathon!
1:36:41
LIVESTREAM GEO #113B: A Tricky Fixed Point Problem from an AoPS Geo Marathon!
LIVESTREAM GEO #113A: Finding the Right Similar Triangles
1:22:54
LIVESTREAM GEO #113A: Finding the Right Similar Triangles
LIVESTREAM GEO #112B: Two Equal Incircles Problems From the Romantics of Geometry Facebook Group!
1:31:47
LIVESTREAM GEO #112B: Two Equal Incircles Problems From the Romantics of Geometry Facebook Group!
LIVESTREAM GEO #112A: A Mix of Easy and Hard Problems from the Thailand TST!
1:26:30
LIVESTREAM GEO #112A: A Mix of Easy and Hard Problems from the Thailand TST!
LIVESTREAM GEO #111B: Isogonal Conjugates in Two Different Quadrilaterals!
1:28:49
LIVESTREAM GEO #111B: Isogonal Conjugates in Two Different Quadrilaterals!
LIVESTREAM GEO #111A: A Highly Theoretical Solution Using the Cayley Bacharach Theorem!
1:31:44
LIVESTREAM GEO #111A: A Highly Theoretical Solution Using the Cayley Bacharach Theorem!
LIVESTREAM GEO #110B: Reflections of Reflections!
1:47:13
LIVESTREAM GEO #110B: Reflections of Reflections!
LIVESTREAM GEO #110A: Two Excellent Problems from the Romantics of Geometry Facebook Group!
1:19:34
LIVESTREAM GEO #110A: Two Excellent Problems from the Romantics of Geometry Facebook Group!
LIVESTREAM GEO #109B: A Few Easier Ones, then a Really Hard One (Which We Didn't Solve!)
1:25:13
LIVESTREAM GEO #109B: A Few Easier Ones, then a Really Hard One (Which We Didn't Solve!)
LIVESTREAM GEO #109A: Moving Points from Vietnam!
1:33:38
LIVESTREAM GEO #109A: Moving Points from Vietnam!