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To rotate a figure 180 degrees clockwise about the origin you need to take all of the coordinates of the figure and change the sign of the x-coordinates to the opposite sign(positive to negative or negative to positive). You then do the same with the y-coordinates and plot the resulting coordinates to get your rotated figure.
A reflection is when a shape flips completely over. The coordinates of the shape will opposite as well. The reflection can change depending what you are flipping it over.
Yes, the result is an enlargement or shrinking, with the origin as centre of enlargement.
Switch the x and y coordinates and multiply the first first coordinate (the new x coordinate) by -1
No, it doesn't change orientation because the coordinates do not change weather they are going clockwise or counter clockwise