{"id":411487,"date":"2026-08-26T20:00:21","date_gmt":"2026-08-26T17:00:21","guid":{"rendered":"https:\/\/menhj.com\/videos\/?post_type=watch&#038;p=411487"},"modified":"2026-08-26T20:00:21","modified_gmt":"2026-08-26T17:00:21","slug":"triangular-numbers-modulo-3-visual-proof","status":"publish","type":"watch","link":"https:\/\/menhj.com\/videos\/watch\/triangular-numbers-modulo-3-visual-proof\/","title":{"rendered":"Triangular Numbers Modulo 3 visual proof"},"content":{"rendered":"<p>1. Triangular Numbers Modulo 3 visual proof \u2014 Mathematical Visual Proofs<br \/>\n2. 3 D Sum of Triangular Numbers visual proof without words III \u2014 Mathematical Visual Proofs<br \/>\n3. Infinite series summing reciprocals of triangular numbers visual proof \u2014 Mathematical Visual Proofs<br \/>\n4. Sum of Triangular Numbers I visual proof \u2014 Mathematical Visual Proofs<br \/>\n5. Alternating Sum of Triangular Numbers visual proof without words \u2014 Mathematical Visual Proofs<br \/>\n6. A Multiplicative Triangular Number Recurrence visual proof \u2014 Mathematical Visual Proofs<br \/>\n7. A Triangular Number Identity I visual proof \u2014 Mathematical Visual Proofs<br \/>\n8. Products of Odd Squares and Triangular Numbers visual proof updated version \u2014 Mathematical Visual Proofs<br \/>\n9. Sum of Odd Cubes is Triangular visual proof without words \u2014 Mathematical Visual Proofs<br \/>\n10. Odd Squares as Difference of Triangular Numbers visual proof \u2014 Mathematical Visual Proofs<br \/>\n11. Squares Modulo 3 visual proof \u2014 Mathematical Visual Proofs<br \/>\n12. Proof Without Words Sum of Triangular Numbers \u2014 Andrew Balm<br \/>\n13. Calculating triangular numbers the fast way visual proof \u2014 Aurian Tobyn<br \/>\n14. Sum of Triangular Numbers II visual proof via cannonballs \u2014 Mathematical Visual Proofs<br \/>\n15. Triangular Numbers 1 2 3 n n n 1 2 \u2014 Tam\u00e1s G\u00f6rbe<br \/>\n16. Triangular Numbers Explained \u2014 Minity Maths<br \/>\n17. Perfect Numbers even ones are Triangular visual proof with bonus open problem \u2014 Mathematical Visual Proofs<br \/>\n18. Triangular Numbers Corbettmaths \u2014 corbettmaths<br \/>\n19. Triangular Numbers Visual Math Sum of Natural Numbers \u2014 Doodlingo IQ<\/p>\n","protected":false},"featured_media":411488,"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-411487","watch","type-watch","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/watch\/411487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/watch"}],"about":[{"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/types\/watch"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/media\/411488"}],"wp:attachment":[{"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/media?parent=411487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/categories?post=411487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/menhj.com\/videos\/wp-json\/wp\/v2\/tags?post=411487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}