3 Rigid Motions

Vocabulary

100

The original image before it is flipped or moved ?

What is pre-image

200

A transformation in which a plane figure turns around a fixed center point.

What is rotation?

300

Operations that alter the form of a figure. Examples: translations, reflections, dilations, and rotations.

What is transformations?

400

This is a property of all three rigid motions, and it means to keep the same lengths, the same angles, and the same distances.

What is PRESERVE?

Reflections and Translations

100

What do we do the reflection across?

The line of reflection.

200

What do the reflections preserve?

distance, angles, and length

300

When we translate we follow the length and direction of this...

What is the vector

Rotations

100

We rotate this way when d<0.

What is CLOCKWISE?

200

This angle of rotation creates the same image if it's rotated clockwise or counterclockwise

What is a rotation of 180 degrees

300

This is the new coordinates of the point P after we rotate P (a, b) around the origin 180 degrees.

What is (-a, -b)

400

This many degrees takes us all the way around a point. Name the degrees and the shape it makes.

360 degrees... circle

Surprise

100

When we move A, B, and L with any of the rigid motions, we label them...

We label them A' B' and L' .

200

An angle is 65 degrees and I translate it. What is the measurement of the translated angle? Why?

It is 65 degrees because angles get preserved in translations.

300

If the length of a segment is 5 cm and we rotate it, how long is the rotated segment? Why?

It is 5 cm because it is preserved in a rotation.

400

When we translate a line, L that has the vector on it, the new line L' will ______________ with L.

Correspond