Rotations Lesson
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Fill each space with the appropriate sign rule. (0,+) (0,-) (-,0) (+,0) (+,+) (-,-) (+,-) (-,+) (Do not use a space in between the signs.) Q1 Positive Y-axis Negative Y-axis Positive x-axis Negative X-axis Q2 Q3 Q4 90 CCW 180 CCW 270 CCW Fill each box with either: Pos x Pos y Neg x Neg y Q1 Q2 Q3 Q4 Identify the resulting quadrant or axis after arotation around the origin with the givendegree of rotation.  Fill in the boxes with the ordered pair (no spaces in between). Notice that every 90 degree rotation swaps the X and Y coordinates and takes the signs of quadrant the point falls in. 1) Every 90 degree turn swaps the X and Y values. 2) Every 90 degree turn moves a point into the next quadrant. These two observations give you a two step method forrotating a point 90 degrees around the origin. By now, you should have noticed two things. Step 2: Step 1: Swap the X and Y values. Rotate P (7,4) around the origin 90 degrees CCW. Identify the quadrant the image will end up in, and apply that quadrant's sign rules to the point. |
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