What do you have to do to the diameter to get the radius formula?

If you have the diameter and you want to find the radius, just remember that the diameter is half of a circle (circumference) and the radius is a quarter of a circle, and it can also be found by dividing the diameter by 2, because the radius is half of a diameter.

I hope this clears your confusion!

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Step-by-step explanation:

y=8/3 is a horizontal line having y-intercept at 8/3