Transformations
10-14
EFGHis the
image.
translation
arrow
IJKLis the
image.
line of
reflection
Think
Half turn is 180°.
MNOPis the
image.
180°
In a plane, a geometric transformation moves a geometric figure
to a new position in one of three ways. Each transformed figure
is the image of the original figure.
translation (or slide) — Every point of a figure moves the same
distance and in the same direction along a line.
reflection (or flip) —A figure is flipped over a line of reflection
so that its mirror imageis formed.
rotation (or turn) —A figure is turned around a center point.
Translation (Slide) Reflection (Flip)
The translation arrow shows that ABCDis ABCDis flipped over the line of
moved 3 units right and 2 units up. reflection to form its mirror image.
Translation imageEFGH ABCD. Reflection image IJKL ABCD.
Rotation (Turn)
The rotation arrow shows that
ABCDis rotated (or turned)
one-half turn counterclockwise
around the rotation center.
Rotation image MNOP ABCD.
rotation center
rotation arrow
K
I
L
J
D
A B
C
C
D
A B
H
E F
G
P
N
O
M
D
A B
C
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