Curated Video
Triangular Numbers Explained
This video explains what triangular numbers are and the patterns associated with them. Two puzzles are at the end of the video.
Curated Video
The Handshake Puzzle
The Handshake Puzzle: a classic mathematical puzzle coming from the topic of combinatorics, this will help develop problem-solving skills. This video provides a demonstration of how to solve the puzzle and asks learners to generalise...
Curated Video
How to Find the nth Triangular Number
This video explains how to find the nth triangular number, including a visual demonstration. Practice questions are at the end of the video.
KnowMo
Introduction to Common Sequences: Triangular, Square, and Cube Numbers
The video introduces viewers to three common types of sequences: triangular numbers, square numbers, and cube numbers. The presenter explains how each of these sequences is derived from specific geometric patterns and provides examples...
TED-Ed
The Mathematical Secrets of Pascal’s Triangle
This modern animation and discussion of the ancient secrets of Pascal's triangle manages to be topical, engaging, and mathematically deep all at the same time. A great introduction to the power of number theory across multiple math...
Corbett Maths
Triangular Numbers
Try teaching triangular numbers. Scholars watch a two-minute video to learn how to generate triangular numbers. They learn about the geometric interpretation of triangular numbers and how two consecutive triangular numbers have a sum...
PBS
Pbs Learning Media: Math in Fencing: Strategy & Connectivity
Learn about the competitive sport of fencing along with the resulting mathematical problems and equivalent expressions that help determine the number of matches played per tournament in this video from the Center for Asian American...
Other
Is All About Math: Triangular Numbers (Part I)
Triangular numbers are introduced in this video which shows how triangular numbers are found and then proceeds to explain Gauss' method for adding arithmetic sequences.
Other
Is All About Math: Triangular Numbers (Part Ii)
Continuing the podcast from Triangular Numbers (Part I), the Gaussian formula for summing numbers of an arithmetic sequence is derived with good explanation, and then used for a couple examples.
Other
Is All About Math: Triangular Numbers (Part Iii)
Continuing from Triangular Numbers (Part II), the podcast solves Gauss' formula for the sum of an arithmetic sequence. Recursive equations are explained heavily, and used in order to solve the Gauss formula.
Khan Academy
Khan Academy: Other Cool Stuff: The Gauss Christmath Special
Video explores triangular numbers and equivalent representations for numbers in the context of the song "The Twelve Days of Christmas."
Khan Academy
Khan Academy: Vi Hart: The Gauss Christmath Special
Video explores triangular numbers and equivalent representations for numbers in the context of the song "The Twelve Days of Christmas." [10:17]