Notes
Reflections
Chapter
10.3
Learning Target: SOL 7.8
The student, given a polygon
in the coordinate plane, will
represent transformations by
graphing in the coordinate plane.
VOCABULARY

A _________________________ is a transformation where a figure is flipped over a line.

The ______________________________ is the line a geometric figure is reflected over.
EXAMPLES
1. Find the vertices of triangle ABC?
A
2. Reflect triangle ABC over the y axis. Find the
vertices of A’B’C’?
C
B
3. Reflect triangle ABC over the x-axis. Find the
vertices of A’’B’’C’’.
Reflecting over the y-axis changes the ___________________ of the point.
Reflecting over the x-axis changes the ___________________ of the point.
4. If DEFG is reflected over the y-axis, what will the
vertices of the image be? Use the grid to check
your answer.
D
F
G
E
Notes
D
5. If DEFG is reflected over the x-axis, what will the
vertices of the image be? Use the grid to check
your answer.
F
G
6. Reflect quadrilateral WXYZ over the x-axis.
Then, reflect the image over the y-axis.
What are the coordinates of W’’X’’Y’’Z’’?
E
w
x
z
Y
Identify the following:
M’
Pre-image:
M
Image:
N’
P’
P
N
Line of Symmetry:
O’
7. Identify the following:
O
C’
B’
Pre-image:
A’
Image:
A
Line of Symmetry:
C
B