1. Come in READY TO LEARN!!! HW: Maintenance Sheet 23
Silently
Complete the Wam 1-5
Volunteer to solve a problem

2. 1. Make sense of problems and persevere in solving them.
4. Model with mathematics.
5. Use appropriate tools strategically.
7. Look for and make use of structure.
8. Look for and express regularity in repeated reasoning.
MGSE8.G.1 Verify experimentally the properties of rotations, reflections, and translations:
a. Lines are taken to lines, and line segments to line segments of the same length.
b. Angles are taken to angles of the same measure.
c. Parallel lines are taken to parallel lines.
MGSE8.G.2 Understand that a two‐dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them. Understand congruence and similarity using physical models, transparencies or geometry software.
I can use the properties of translations, rotations, and reflections on line segments, angles, parallel lines or geometric figures.
I can show and explain two figures are congruent using transformations (explaining the series of transformations used)
I can determine the new coordinate of a figure given a dilation, translation, rotation, or reflection.
Learning Targets

3. Vocabulary Review: pre-image, image, transformation, translation
Vocabulary Review: pre-image, image, transformation, translation *one word will not be used
transformation
A _________________is a change in the size, location or orientation of a figure.
The resulting figure after a transformation is called the ___________ of the original figure.
A ______________ is a transformation which slides each point of a figure the same distance and in the same direction.
image
translation

4. Choral Response image translation transformation
A _________________is a change in the size, location or orientation of a figure.
The resulting figure after a transformation is called the ___________ of the original figure.
A ______________ is a transformation which slides each point of a figure the same distance and in the same direction.
image
translation

5. Translation Direction/Location
Think-pair-share
 Translation Direction/Location
Add
Subtract
x coordinate
y coordinate
left
right
down up

6. Translations
Translate 4
units down, then
Translate 3
Units right

7. Translations
Translate 4
units down, then
Translate 3
Units right

8. Translate the figure 7 units right and 3 units up.
Example
Translate the figure 7 units right and 3 units up.
Image figure
A’ B’ C’
Original figure
A B C

9. Write a “rule” Start at original figure ABC 3 units up, 7 units right
Right = positive x
Up = positive y
Rule:
(x + 7, y + 3)

10. Task 1: Translation Practice
Work Session
Task 2: tinyurl.com/reflections102
      
I can use the properties of translations, rotations, and reflections on line segments, angles, parallel lines or geometric figures.
I can show and explain two figures are congruent using transformations (explaining the series of transformations used)
I can determine the new coordinate of a figure given a dilation, translation, rotation, or reflection.
Rule (fill in blanks with + or – and how many up/ down/ left/ right:
(x_____ , y_____ )
End of Class Summarization/ TOD:
How do you feel about translation and reflection?