Download Geometry – ROTATIONS Notes/Examples

Geometry – ROTATIONS Notes/Examples
Name ____________________________
I. Definition:
Rotation:
a Transformation in which the preimage is “turned” or “spins” around a fixed point
The fixed point is called the __Center_____. A rotation is an __Isometry_________________.
**Rotations can be clockwise or counterclockwise.**
II. Determine whether the figure has rotational symmetry about the center point.
If so, describe the symmetry.
a)
a)
b)
90 degrees
c)
b)
**360 degrees
divided by 4**
(4 equal sides)
__72 degrees
60 degrees___
c)
**360 degrees
divided by 5**
(5 points on the star)
**360 degrees
divided by 6**
(6 equal sides)
III. Given: Square ABCD with center at point X.
A
Name the image of the segment:
a) 90 clockwise rotation of AF about X.
E
F
a) _Line_BG_
X
D
b) 180 rotation of DHX about X.
b) _
B
Triangle BFX
H
c) 90 counterclockwise rotation of XH about H.
c) _
G
Line DH
C