Which one of the following figures represents a rotation? Explain.
In order to describe a rotation, you need to state how many degrees the preimage rotated, the center of rotation, and the direction of the rotation (clockwise or counterclockwise). The most common center of rotation is the origin. The table below shows what happens to points when they have undergone a rotation about the origin. The angles are given as counterclockwise.
|Center of Rotation||Angle of Rotation||Preimage (Point
||Rotated Image (Point
Let's describe the following rotations:
- The rotation of the blue triangle in the diagram below.
- Image A to image B
- The rotation in the diagram below.
To describe the rotation in this diagram, look at the points indicated on the S shape.
Earlier, you were shown following three figures and asked which one of the figures represents a rotation.
Describe the rotation of the pink triangle in the diagram below.
Examine the points of the preimage and the rotated image (the blue triangle).
Describe the rotation of the blue polygon in the diagram below.
Describe the rotation of the green hexagon in the diagram below.
- (3, 1)
- (4, -2)
- (-5, 3)
- (-6, 4)
- (-3, -3)
- (-4, 3)
- (5, -4)
- (-5, -4)
- (3, 3)
- (-8, -9)
Describe the following rotations:
- Why is it not necessary to specify the direction when rotating
To see the Review answers, open this PDF file and look for section 10.7.