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  1. A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself

  2. Step-by-step explanation:

    a) For a prime numbers we have array with 2 rectangulars R1: a=1 and b=prime number; R2: a=prime number and b=1. Both has the same are, that prime number.

    b) For a composite number which are not square number we have rectanular array with even numbers of ractangulars. For example, number 6.

    R1: a=1,b=6; R2: a=2,b=3; R3: a=3, b=2; R4: a=6,b=1. Each rectangular has the same area, 6.

    c) The square number we alway have te odd number of rectanulars, because of the square a=x,b=x can not be simetric. For example 16.

    R1: a=1,b=16; R2: a=2 , b=8; R3: a=4,b=4; R4: a=8, b=2; R5:a=16,b=1.Each rectangular has the same area, 16.

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