The rotation(x,y) (y,-x) maps p and p' Find the measure of the acute or right angle formed by intersecting lines so that P can be mapped to P' using two reflections.

Answer 1

To reverse the x and y coordinates, reflect the point across the line y = x.

Then to switch the sign on the y coordinate reflect the point across the x - axis.

The angle between the two lines is 45 degrees.

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