https://www.khanacademy.org/math/revision-mr-class-5-math-term-2/x35261c07dfea7828:week-3/x35261c07dfea7828:patterns/v/triangular-numbers 2026-02-25T07:40:45.884125818Z Triangular Numbers Numbers can make shapes! Triangular numbers are like a bowling pin setup—they start with one at the top and get wider at the bottom. We’ll build these patterns with dots and see how the sequence grows. It’s like building a pyramid of oranges! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Triangular Numbers Numbers can make shapes! Triangular numbers are like a bowling pin setup—they start with one at the top and get wider at the bottom. We’ll build these patterns with dots and see how the sequence grows. It’s like building a pyramid of oranges! https://cdn.kastatic.org/ka-youtube-converted/bx4Z8ZBuXGo.mp4/bx4Z8ZBuXGo.mp4 148 Patterns https://www.khanacademy.org/math/revision-mr-class-5-math-term-2/x35261c07dfea7828:week-3/x35261c07dfea7828:patterns/v/square-numbers 2026-02-25T07:40:45.884125818Z Square Numbers Square numbers are super powerful! They happen when a number is multiplied by its own "twin" (like 3 times 3). We’ll show you how these numbers make perfect square grids and give you a list of the most important ones to remember for your next math test! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Square Numbers Square numbers are super powerful! They happen when a number is multiplied by its own "twin" (like 3 times 3). We’ll show you how these numbers make perfect square grids and give you a list of the most important ones to remember for your next math test! https://cdn.kastatic.org/ka-youtube-converted/Ro38G7t0Hkk.mp4/Ro38G7t0Hkk.mp4 141 Patterns https://www.khanacademy.org/math/revision-mr-class-5-math-term-2/x35261c07dfea7828:week-3/x35261c07dfea7828:patterns/e/triangular-and-square-numbers 2026-02-25T07:40:45.884125818Z Triangular and Square Numbers In this exercise, students will learn how to identify and visualize square and triangular numbers by recognizing their geometric patterns and building sequences through simple addition and multiplication. Khan Academy exercise https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:patterns-in-mathematics-india/x04ca845a9a148c80:visualising-number-sequences-india/e/adding-triangular-numbers 2025-02-10T11:15:42.866710478Z Adding triangular numbers This exercise is about adding triangular numbers Devashish Phadnis exercise