Number of rectangles in a grid - Grand Oral du Bac
What is the formula for the number of rectangles in a grid?
Link to the video with squares: • Nombre de carrés dans un quadrillage : f...
Simplification of factorials: • Simplification de factoriel - exercices co...
Other topics for the Grand Oral: https://www.methodemaths.fr/sujets_gr...
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00:00 Introduction
00:25 Presentation of the method
01:00 Example with a rectangle
01:45 Demonstration of the formula using counting
02:50 Review of binomial coefficients
03:25 Application of the formula to the example
03:45 Generalization of the formula