1. G.CO.2&5: Rotations
March 4th, 2015

2. clockwise Counter-clockwise Rotations Vocabulary rotate
To _______ a figure, you must have a ________________ and _______________. A figure can be rotated _________ or ________________. For today’s lesson, we are focusing on rotations of 90, 180, and 270 degrees about the origin.
Center of Rotation
Angle of Rotation
clockwise
Counter-clockwise

3. Rotate the given point 90, 180, and 270 degrees counter-clockwise about the origin.
Ex 1)

4. Rotate the given point 90, 180, and 270 degrees counter-clockwise about the origin.
Ex 2). Original Point: (5, 7)

5. Let’s fill out this table using what we found from the examples.
Original Point 90
180
270
Example 1
Example 2
(x, y)

6. Ex 3). Graph quadrilateral ABCD by plotting the points A (-12, 9), B (-12, 4), C (-4, 4), and
D (-4, 10). Rotate the figure 90, 180, and 270 degrees about the origin.

7. Ex 4). △JKL has vertices J(2, 6), K(5, 2), and L(7, 5)
Ex 4). △JKL has vertices J(2, 6), K(5, 2), and L(7, 5). Rotate the figure 90, 180, and 270 degrees about the origin.