Applications of PnC in Geometry | Permutations and Combinations | Grade 11 | Math | Khan Academy

In this video, we apply the concepts of permutations and combination to the world of geometry. We find out how many lines pass through a given number of non-collinear points. We then figure out the number of diagonals using the number of sides of the polygon. We also figure out the number of triangles formed using a given number of non-collinear points. Finally, we tackle the case of collinearity. What happens if some points are collinear and rest are not? Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/math/ncer...) Timestamps: 0:00 Finding number of lines through given points 2:20 Finding number of diagonals of a given polygon 4:00Finding number of triangles formed using a given set of points 4:55 Tackling the case of collinear points Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Ashish Gupta