01:32:58

LIVESTREAM GEO #123B: One Hard and two Easy from the Korea Winter Camp!

01:24:07

LIVESTREAM GEO #123A: A Very Instructive Application of Sqrt(bc) Inversion!

01:22:27

LIVESTREAM GEO #122B: Two Hard Problems from Two Mock Geo Contests - We Didn't Solve Either!

01:36:22

LIVESTREAM GEO #122A: Using Symmetry to Prove a Radical Axis Bisects a Segment!

01:55:21

LIVESTREAM GEO #121B: Turning One Problem Into a New One with Sqrt(bc) Inversion!

01:03:39

LIVESTREAM GEO #121A: Finding the Right Application of Desargues!

01:15:33

LIVESTREAM GEO #120B: Two Triangles with the Same Orthocenter and Circumcenter!

01:38:16

LIVESTREAM GEO #120A: Two Problems from the Recently Released 2022 IMO Shortlist!

01:23:38

LIVESTREAM GEO #119B: A Unique Solution by Reflecting a Poncelet Point!

01:38:18

LIVESTREAM GEO #119A: From the 2023 IMO (Problem 2)!

01:25:04

LIVESTREAM GEO #118B: An Inversion with Respect to the Excircle!

01:37:00

LIVESTREAM GEO #118: A Nice Problem Involving Isogonal Lines and Similar Triangles!

01:25:44

LIVESTREAM GEO #117B: A Combination of Homothety and Pole/Polar!

01:34:38

LIVESTREAM GEO #117A: Yet Another Problem Involving Line IO, Solved with Vectors!

01:16:29

LIVESTREAM GEO #116B: Lots of Parallel Lines and Ratios!

01:43:34

LIVESTREAM GEO #116A: A Very Cool China TST Problem Involving the Line IO!

55:40

LIVESTREAM GEO #115B: A Very Tough Anti-Steiner Point Problem!

02:04:48

LIVESTREAM GEO #115A: We Proved a Deep but Unnecessary Fact, then Solved the Original Problem!

01:33:29

LIVESTREAM GEO #114B: The Last Problem Was My Favorite!

01:25:49

LIVESTREAM GEO #114A: An Excellent Recent Problem from the Serbia IMO Team Selection Test!

01:36:41

LIVESTREAM GEO #113B: A Tricky Fixed Point Problem from an AoPS Geo Marathon!

01:22:54

LIVESTREAM GEO #113A: Finding the Right Similar Triangles

01:31:47

LIVESTREAM GEO #112B: Two Equal Incircles Problems From the Romantics of Geometry Facebook Group!

01:26:30

LIVESTREAM GEO #112A: A Mix of Easy and Hard Problems from the Thailand TST!

01:28:49

LIVESTREAM GEO #111B: Isogonal Conjugates in Two Different Quadrilaterals!

01:31:44

LIVESTREAM GEO #111A: A Highly Theoretical Solution Using the Cayley Bacharach Theorem!

01:47:13

LIVESTREAM GEO #110B: Reflections of Reflections!

01:19:34

LIVESTREAM GEO #110A: Two Excellent Problems from the Romantics of Geometry Facebook Group!

01:25:13

LIVESTREAM GEO #109B: A Few Easier Ones, then a Really Hard One (Which We Didn't Solve!)

01:33:38

LIVESTREAM GEO #109A: Moving Points from Vietnam!

01:25:59

LIVESTREAM GEO #108B: An Unusual Concurrency from the AoPS Quarantine Geometry Olympiad!

01:34:38

LIVESTREAM GEO #108A: Harmonic Quads, Mixtilinear Incircles, and Radical Axes form Serbia!

01:26:32

LIVESTREAM GEO #107B: Quadruple Pascal and Two Mixtilinear Incircles!

01:34:19

LIVESTREAM GEO #107A: Inversion and then More Inversion!

01:35:42

LIVESTREAM GEO #106B: A Mix of Hard and Easy Problems

01:23:34

LIVESTREAM GEO #106A: A Beautiful Lemma on Bicentric Quadrilaterals!

01:24:58

LIVESTREAM GEO #105B: A Powerful Use of Sondat's Theorem, and Four Feurbach-Like Points!

01:36:48

LIVESTREAM GEO #105A: Menelaus, Desargues, Ceva, and the Isogonal Line Lemma!

01:48:00

LIVESTREAM GEO #104B: A Fairly Complex Solution Using Homothety and the Cevian's Nest Theorem!

01:14:52

LIVESTREAM GEO #104A: We Used A Problem From Video #84B!

01:35:28

LIVESTREAM GEO #103B: A Few More Phenomenal Problems from Komal!

01:23:47

LIVESTREAM GEO #103A: Two Excellent Problems and Solutions from the Komal Journal!

01:33:12

LIVESTREAM GEO #102B: An Incredible Solution and Diagram to the Last Problem!

01:33:14

LIVESTREAM GEO #102A: Sine Ratios, Spiral Similarities, and a Harmonic Quad!

01:22:17

LIVESTREAM GEO #101B: Finding the Right Similar Trapezoids!

01:32:58

LIVESTREAM GEO #101A: Middle, Easy, then Hard Difficulty!

01:23:32

LIVESTREAM GEO #100B: Transforming the Original Problem to a New One with Excenter Lemmas!

01:37:21

LIVESTREAM GEO #100A: More Apollonius Circles and an Interesting Radical Axis!

01:17:23

LIVESTREAM GEO #99B: A Brilliant Vietnamese Lemma, Then a Problem from a Previous Session!

01:38:42

LIVESTREAM GEO #99A: Apollonius Circles and a Pythagoras Bash!

01:41:08

LIVESTREAM GEO #98B: We Solved the Hard One But Not the Easy One!

01:16:20

LIVESTREAM GEO #98A: Double Brocard and Pappus (then a Dumpty Point)!

01:23:14

LIVESTREAM GEO #97B: A Dazzling Combination of a Homothety with a Harmonic Quad!

01:37:14

LIVESTREAM GEO #97A: Inversion Preserves the Cross Ratio - A Beautiful Application!

01:30:03

LIVESTREAM GEO #96B: Very Difficult Problems from the Recent Iranian Geometry Olympiad!

01:27:02

LIVESTREAM GEO #96A: We Added a Lot of New Points to the Diagram for the Second Problem!

01:56:08

LIVESTREAM GEO #95B: I Saw Three Different Solutions to a Problem Before, But Forgot All of Them!

01:06:53

LIVESTREAM GEO #95A: We Proved the General Problem by Showing a Special Case!

59:25

LIVESTREAM GEO #94B: A Simpler Solution to the First Half of a Problem

02:02:01

LIVESTREAM GEO #94A: One and a Half Solutions With Inversion!