Vladimir likes to draw rectangles. Yesterday he created all rectangles that had sides in centimeters and a circumference of 18 cm. How many rectangles of different dimensions have been drawn?

Correct answer:

n =  4

Step-by-step explanation:

2(a+b) = 18 a+b = 9  a1=5, b1=4 a2=6, b2=3 a3=7, b3=2 a4=8, b4=1  n=4

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