Point M is the midpoint of line AB. If M is at (6,-2) and A is at (-3,0), what are the coordinates of endpoint b?
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Check the picture below.
so the perimeter will be, 3+3+3+3+3+3 plus the circumference of those two semi-circles, now, the two semi-circles together form a whole circle, whose radius is 3, so the perimeter will be 3+3+3+3+3+3 plus the circumference of a full circle with a radius of 3.
