1.

Write the sequence formed by the number of diagonals from a vertex of a triangle, a quadrilateral, a pentagon etc. What is its algebra?

Answer»

Diagonal drawn from one vertex of a triangle = 0 = 3 – 3 = 0

Diagonal drawn from one vertex of a quadrilateral = 4 – 3 = 1

Diagonal drawn from one vertex of a pentagon = 5 – 3 = 2

Diagonal drawn from one vertex of a n sided polygon = n – 3

Sequence of number of diagonals 0, 1, 2, 3, 4, ……….

Algebraic expression x= n – 3



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