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5861.If a, b and c are any three whole numbers, then a + (b + c) = (a + b) + c called?
5862.The point of concurrency of the three angle bisectors of a triangle is called the _______?
5863.With every square matrix A, a unique real number is associated which is called the ______ of A.
5864.A square matrix in which all the elements lying on the main diagonal of the matrix are equal and the remaining elements off the main diagonal are all zero is called?
5865.The lines which can never intersect each other are called _____?
5866.Polygon is a shape bounded by ______ lines.
5867.Find θ when I = 30 cmr r = 6 cm?
5868.{x|x ∈ N, 1 ≤ x < 4} = _____?
5869.The set of all number of the form p/q where ______ is called the set of rational numbers.