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Bellringer
Timer starts when the bell rings,
You have 5 minutes
Unit 5 Transformations
Today’s topic: translations
Standard COS 6: Use geometric descriptions of rigid motions to transform figures.
Jobs used in: Computer and information systems, engineering (all types), constructions, funeral directors
Vocabulary
Transformation: a change in the position, shape, or size of a geometric figure.Preimage: the original figure in a transformation.Image: the figure after the transformationRigid motion: a transformation that preserves distance and angle measure.
Example 1: Identifying Rigid Motion
Does the transformation appear to be a rigid motion. Explain
Preimage image
Examples, you try
Does the transformation appear to be a rigid motion? Explain
Example 2: Naming images and corresponding parts
In the diagram EFGH E’F’G’H’What are the images ofAngle f and angle h?
What are the pairs of corresponding sides?
Example, you tryIn the diagram NID SUPWhat are the images of Angle I and point D?
What are the corresponding sides?
Translation
A translation is a transformation that maps all points of a figure the same distance in the same direction.Example:
Finding the image of a translation
What are the vertices of T ( PQR)? Graph the image of PQR
Example, you try
What are the vertices of T ( ABC)? Graph the image of ABC
Writing the rule to describe a translation
LMN’s translation is L’M’N’with L’ (1, -2) M’(3, -4) N’(6, -2)
What is a rule that describes the translation?
Assignment
Page 550: 7-18 all