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) b) c)

a) 90 degrees b) __72 degrees c) 60 degrees___

**360 degrees **360 degrees **360 degrees

divided by 4** divided by 5** divided by 6**

(4 equal sides) (5 points on the star) (6 equal sides)

III. Given: Square ABCD with center at point X. A

Name the image of the segment: E F

a) 90( clockwise rotation of [pic] about X. a) _Line_BG_ X

D B

b) 180( rotation of (DHX about X. b) _ Triangle BFX

H G

c) 90( counterclockwise rotation of [pic] about H. c) _ Line DH

C

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