20 October 2025

• 16:4216:42, 20 October 2025 diff hist +27 Isogonal conjugate →Ratio for three pairs of isogonal points current
• 16:4016:40, 20 October 2025 diff hist 0 Isogonal conjugate →Three pairs isogonal points
• 16:3916:39, 20 October 2025 diff hist +14 Isogonal conjugate →Isogonic center’s conjugate point
• 16:3616:36, 20 October 2025 diff hist −1 Isogonal conjugate →Miquel point for two pare isogonal points
• 16:3416:34, 20 October 2025 diff hist +11 Isogonal conjugate →Isogonal bijection lines and points
• 16:3216:32, 20 October 2025 diff hist 0 Isogonal conjugate →Simplified problem
• 16:3116:31, 20 October 2025 diff hist −1 Isogonal conjugate →Simplified problem
• 16:3016:30, 20 October 2025 diff hist +15 Isogonal conjugate →Miquel point for isogonal conjugate points
• 16:2716:27, 20 October 2025 diff hist +30 Isogonal conjugate →Fixed point on circumcircle
• 16:2516:25, 20 October 2025 diff hist +13 Isogonal conjugate →Point on circumcircle
• 16:2316:23, 20 October 2025 diff hist +15 Isogonal conjugate →Simplified distance formula for isogonal points
• 16:2216:22, 20 October 2025 diff hist +14 Isogonal conjugate →Equidistant isogonal conjugate points
• 16:1916:19, 20 October 2025 diff hist 0 Isogonal conjugate →Definition of isogonal conjugate of a point
• 16:1816:18, 20 October 2025 diff hist −13 Isogonal conjugate →Isogonals in complete quadrilateral
• 16:1616:16, 20 October 2025 diff hist −107 Isogonal conjugate No edit summary

8 October 2025

• 05:3705:37, 8 October 2025 diff hist +13 Symmedians, Lemoine point →Tucker circle current
• 05:3605:36, 8 October 2025 diff hist +14 Symmedians, Lemoine point →Three intersecting antiparallel segments
• 05:3405:34, 8 October 2025 diff hist +14 Symmedians, Lemoine point →Lemoine point line
• 05:3305:33, 8 October 2025 diff hist +17 Symmedians, Lemoine point →Lemoine point and perpendicularity
• 05:3205:32, 8 October 2025 diff hist +49 Symmedians, Lemoine point →Common Lemoine point
• 05:2805:28, 8 October 2025 diff hist +17 Symmedians, Lemoine point →Radical axis
• 05:2605:26, 8 October 2025 diff hist +15 Symmedians, Lemoine point →Lemoine point properties
• 05:2405:24, 8 October 2025 diff hist +1 Symmedians, Lemoine point →Proportions

24 September 2025

• 19:0719:07, 24 September 2025 diff hist −62 Projective geometry (simplest cases) →Polar and point current

21 September 2025

• 11:3911:39, 21 September 2025 diff hist +47 1985 IMO Problems/Problem 5 →Solution 4 (Sparrow solution) current
• 11:3611:36, 21 September 2025 diff hist +1,317 1985 IMO Problems/Problem 5 →Solution 3 (No Miquel's point)
• 11:2811:28, 21 September 2025 diff hist +11 Sparrow’s lemmas →IMO 1985 5 Sparrow current
• 11:2011:20, 21 September 2025 diff hist +1,779 Sparrow’s lemmas →Russian Math Olympiad 1999
• 11:1711:17, 21 September 2025 diff hist 0 N File:IMO 1985 5 Sparrow.png No edit summary current

19 September 2025

• 15:5315:53, 19 September 2025 diff hist +1,111 Sparrow’s lemmas →Sparrow’s Lemma 3
• 15:4815:48, 19 September 2025 diff hist 0 N File:Sparrow 3A.png No edit summary current

18 September 2025

• 13:2113:21, 18 September 2025 diff hist +1 Sparrow’s lemmas →Russian Math Olympiad 1999
• 13:1913:19, 18 September 2025 diff hist +1,122 Sparrow’s lemmas →Russian Math Olympiad 2005
• 13:1313:13, 18 September 2025 diff hist 0 N File:Sparrow problem 3.png No edit summary current
• 08:3308:33, 18 September 2025 diff hist +1,147 Sparrow’s lemmas →Russian Math Olympiad 2011
• 08:3008:30, 18 September 2025 diff hist 0 N File:Sparrow problem 2.png No edit summary current

17 September 2025

• 15:2015:20, 17 September 2025 diff hist +951 Sparrow’s lemmas →Sparrow’s Lemma 3
• 15:1715:17, 17 September 2025 diff hist 0 N File:Sparrow problem 1.png No edit summary current
• 12:4712:47, 17 September 2025 diff hist −37 Sparrow’s lemmas →Sparrow’s Lemma 2
• 10:1310:13, 17 September 2025 diff hist +465 Sparrow’s lemmas →Sparrow’s Lemma 3
• 09:2209:22, 17 September 2025 diff hist +1,279 Sparrow’s lemmas →Sparrow’s Lemma 1A
• 09:1909:19, 17 September 2025 diff hist 0 N File:Sparrow 3.png No edit summary current

16 September 2025

• 15:1615:16, 16 September 2025 diff hist +61 Sparrow’s lemmas No edit summary
• 15:1115:11, 16 September 2025 diff hist +1,323 Sparrow’s lemmas →Sparrow's Lemma 1
• 15:0415:04, 16 September 2025 diff hist 0 N File:Sparrow 1A.png No edit summary current
• 14:3214:32, 16 September 2025 diff hist +30 Kepler triangle →Bevan point’s problems current
• 14:2714:27, 16 September 2025 diff hist +4 Sparrow’s lemmas →Sparrow's Lemma 1
• 14:2414:24, 16 September 2025 diff hist 0 N File:Sparrow 1.png No edit summary current
• 14:2314:23, 16 September 2025 diff hist +10 Sparrow’s lemmas →Lemma 1
• 14:2214:22, 16 September 2025 diff hist +979 N Sparrow’s lemmas Created page with "Sparrow’s lemmas have been known to Russian Olympiad participants since at least 2016. ==Lemma 1== 300px|right Let triangle <math>ABC</math> with circumc..."