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- of zero for the whole figure.<ref>{{cite journal|url=http://dynamicmathematicslearning.com/crossed-quad-area.pdf|title=Slaying a geometrical 'Monster':...37 KB (4,236 words) - 14:28, 13 January 2025
[[cut-the-knot]] * [http://dynamicmathematicslearning.com/similarparabola.html The similarity of parabola] at [http://dynamicmathematicslearning.com/JavaGSPLinks.htm...80 KB (13,423 words) - 11:24, 1 April 2025
[http://dynamicmathematicslearning.com/quad-tree-new-web.html A (dynamic) Hierarchical Quadrilateral Tree] at [http://dynamicmathematicslearning.com/JavaGSPLinks...50 KB (6,989 words) - 06:50, 2 April 2025- radius of circumcircle of triangle] at Mathalino.com * [http://dynamicmathematicslearning.com/semi-regular-anglegon.html Semi-regular angle-gons and side-gons:...27 KB (4,770 words) - 06:29, 14 April 2025
Centroid construction with compass and straightedge] * [http://dynamicmathematicslearning.com/findingtrianglemedian.html Experimentally finding the medians...26 KB (4,242 words) - 05:08, 1 March 2025
html Animated demonstration of similar triangles] *[http://dynamicmathematicslearning.com/fundamental-theorem-similarity.html A Fundamental Theorem of...28 KB (3,581 words) - 20:42, 2 April 2025
com/triangleinternalangles.html Internal angles of a triangle] *[http://dynamicmathematicslearning.com/star_pentagon.html Interior angle sum of polygons: a general...6 KB (698 words) - 16:22, 17 April 2025
[https://dynamicmathematicslearning.com/ninepointconic.html Nine-point conic and Euler line generalization] at [http://dynamicmathematicslearning.com/JavaGSPLinks...16 KB (2,094 words) - 21:20, 20 January 2025
[[Category:Types of quadrilaterals]] ==External links== * [https://dynamicmathematicslearning.com/orthodiagonal-quad-van-aubel.html A Van Aubel like property...17 KB (1,767 words) - 07:58, 5 January 2025
[[Category:Types of quadrilaterals]] ==External links== * [https://dynamicmathematicslearning.com/equidiagonal-quad-van-aubel.html A Van Aubel like property of...7 KB (729 words) - 07:56, 5 January 2025
[http://dynamicmathematicslearning.com/ninepointconic.html Nine-point conic and Euler line generalization], [http://dynamicmathematicslearning.com/furtherEuler...18 KB (2,590 words) - 19:02, 22 January 2025
* [http://dynamicmathematicslearning.com/fermat-general.html Fermat-Torricelli generalization] at [http://dynamicmathematicslearning.com/JavaGSPLinks...21 KB (3,133 words) - 08:55, 11 January 2025
{{MathWorld |title=Ceva's Theorem |urlname=CevasTheorem}} * [http://dynamicmathematicslearning.com/finding-centroid-ceva.html Experimentally finding the centroid...14 KB (1,930 words) - 16:50, 17 April 2025
|title=Napoleon's Theorem |urlname=NapoleonsTheorem}} * [http://dynamicmathematicslearning.com/napole1.html Napoleon's Theorem and some generalizations, variations...22 KB (2,901 words) - 02:30, 15 February 2025
[http://dynamicmathematicslearning.com/miquel.html A generalization of Neuberg's theorem and the Simson-Wallace line] at [http://dynamicmathematicslearning.com/JavaGSPLinks...10 KB (1,189 words) - 05:26, 19 March 2025
web|url=http://dynamicmathematicslearning.com/clough.html|title= A variation of Viviani's theorem & some generalizations}} at [http://dynamicmathematicslearning.com/JavaGSPLinks...8 KB (912 words) - 00:14, 6 December 2024
Bretschneider's formula] at proofwiki.org * [https://dynamicmathematicslearning.com/brahmagupta-crossed-cyclic.html Bretschneider's Quadrilateral...6 KB (1,286 words) - 06:05, 22 October 2024
405-412.</ref><ref name="Silvester">J. R. Silvester: [http://dynamicmathematicslearning.com/Silvester-van-aubel.pdf "Extensions of a Theorem of Van Aubel"]...6 KB (618 words) - 08:04, 5 January 2025
html Varignon Parallelogram in Compendium Geometry] * [http://dynamicmathematicslearning.com/octagoncentroids.html A generalization of Varignon's theorem...11 KB (1,222 words) - 06:55, 30 January 2025
[http://dynamicmathematicslearning.com/miquel.html A generalization of Neuberg's theorem and the Simson-Wallace line] at [http://dynamicmathematicslearning.com/JavaGSPLinks...5 KB (482 words) - 13:05, 2 March 2025