http://www.mindbites.com/lesson/5097-perms-combs-combinations-part-ii-525 This 60 minute perms & combs lesson is all about combinations with non-collinear points, polygon diagonals, and more difficult problems with numbers on committees and cards. Also covered in this lesson are selections from the same group, dividing objects into two groups and choosing objects first before they are arranged. This lesson will show you how to: - draw polygons using non-collinear points & find the number of diagonals - answer questions involving cards and committees with at least or at most requirements - answer questions involving selections from the same group and dividing objects into two groups of equal size - answer questions where the objects must first be selected and then arranged Sample question: How many diagonals does a hexagon have? (Diagonals are line segments that join two vertices but are not sides.) This lesson contains explanations of the concepts and 20 example questions with step by step solutions plus 7 interactive review questions with solutions. Lessons that will help you with the fundamentals of this lesson include: - 230 Solving Quadratic Equations by Factoring (http://www.mindbites.com/lesson/5087) - 505 Factorial Notation & Linear Permutations (http://www.mindbites.com/lesson/5105) - 520 Combinations Part I (http://www.mindbites.com/lesson/5090)
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