How would you use a model to determine the approximate formula for the circumference of a circle with a diameter of 6 cm, and connect the model to the actual formula?

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step-by-step explanation:

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6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.

whats the rest of it?