reflection - deer valley unified school district · object and moving it to a ... translation:...

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1 Jun 209:28 AM 1.3 Definitions of Rigid Transformations I CAN... Identify rigid motions: reflections, rotations, translations, and compositions Jun 209:28 AM Rigid Motion: the action of taking an object and moving it to a different location without altering its shape or size. Corresponding angles and sides stay congruent NonRigid Motion: Size is changed, but shape is not. Jun 209:28 AM Reflection: mirror image, a flip over a line of symmetry, Jun 209:28 AM Reflection: mirror image, a flip over a line of symmetry, Jun 209:28 AM Sketch the reflection of the figure over the given line Jun 209:28 AM Translation: slide, glide A C B D

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Page 1: Reflection - Deer Valley Unified School District · object and moving it to a ... Translation: slide, glide A C B D. 2 Jun 209:28 AM Translation: slide, glide A C B D D' C' B' A

1

Jun 20­9:28 AM

1.3 Definitions of Rigid Transformations

I CAN...

Identify rigid motions: reflections, rotations, translations, and compositions  

Jun 20­9:28 AM

Rigid Motion: the action of taking an object and moving it to a different location without altering its shape or size. 

Corresponding angles and sides stay congruent

Non­Rigid Motion: Size is changed, but shape is not.

Jun 20­9:28 AM

Reflection: mirror image, a flip                    over a line of symmetry, 

Jun 20­9:28 AM

Reflection: mirror image, a flip                    over a line of symmetry, 

Jun 20­9:28 AM

Sketch the reflection of the figure over the given line

Jun 20­9:28 AM

Translation: slide, glide

A

C

B

D

Page 2: Reflection - Deer Valley Unified School District · object and moving it to a ... Translation: slide, glide A C B D. 2 Jun 209:28 AM Translation: slide, glide A C B D D' C' B' A

2

Jun 20­9:28 AM

Translation: slide, glide

A

C

B

D

D' C'

B'A'

Jun 20­9:28 AM

Rotation: twist, turn about a point

Jun 20­9:28 AM

Rotation: twist, turn about a point

Clockwise or Counterclockwise?

Jun 20­9:28 AM

For the following diagram, which description best identifies the rotation of triangle ABC around point Q?

A. 20° clockwise

B. 20° counterclockwise

C. 90° clockwise

D. 90° counterclockwise

Jun 20­9:28 AM

Lines of Symmetry

Jun 20­9:28 AM

Rotational Symmetry 

Page 3: Reflection - Deer Valley Unified School District · object and moving it to a ... Translation: slide, glide A C B D. 2 Jun 209:28 AM Translation: slide, glide A C B D D' C' B' A

3

Jun 20­9:28 AM

Composition: 2 or moretransformations applied to an object

Jun 20­9:28 AM

What is the composition?