Remember that the rotation should be counterclockwise.
Practice makes perfect
Note that point P is one of the vertices of our triangle. This means that all other vertices will rotate around this point. Also, remember that the rotation should be counterclockwise. Therefore, to rotate R, we measure an angle of 130^(∘) with PR using a protractor.
Second, using a ruler or compass, we place a point along the ray so that PR=PR'.
Repeating this procedure for the last vertice, we can draw PR'Q'.
