This document discusses identifying changes in geometric figures through transformations. It defines a transformation as changing the position or orientation of a figure, with the resulting figure being the image of the original. There are four main types of transformations: translation, reflection, rotation, and congruence. Translation moves a figure along a straight line without turning. Reflection flips a figure across a line. Rotation turns a figure around a fixed point. The document provides examples of identifying different transformations and their characteristics.

1. EQ: How do I identify changes in a
geometric figure?

2. * In mathematics, a transformation changes
the position or orientation of a figure.
*The resulting figure is the image of the original.
*Points on the image are identified as “prime”
and labeled (‘) (for example A’ is an image of point A)
* The original figure is the pre-image.
* Images resulting from the transformations
described in the next slides are congruent to the
original figures.
VOCABULARY UNIT 1

3. Translation
The figure slides along a straight line
without turning.
Types of Transformations

4. Reflection
The figure flips across a line of
reflection, creating a mirror image.
Types of Transformations

5. Rotation
The figure turns around a fixed point.
Types of Transformations

6. Identify each type of transformation.
Identifying Types of Transformations
The figure flips across
the y-axis.
1A. 1B.
It is a translation.It is a reflection.
The figure slides along
a straight line.

7. Identify each type of transformation.
2A. 2B.
Insert Lesson Title Here
x
y
2
2
–2
–4
4
4
–4
–2 0
x
y
2
2
–2
–4
4
4
–4
–2 0
It is a translation.
The figure slides along
a straight line.
It is a rotation.
The figure turns
around a fixed point.