Week in Preview

Monday - Reviewing/Drawing Transformations - Handout

Tuesday - Labeling shapes - Points, Lines, and Angles

2 dimensional Shapes - Intro to Polygons

Wednesday - No Class

Thursday - Triangles and Quadrilaterals.

Friday - Solid Shapes - Three dimensional Shapes

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#### Tuesday, October 21, 2014

LO (Homework) - Draw the 6 Translations in the packet

Review the notes on naming Points, Lines, Line Segments, and Angles

#### Monday, October 20, 2014

Today we reviewed and practiced drawing REFLECTIONS and TRANSLATIONS in class. This work requires a certain level of focus and accuracy, so if you spent way to much time in class today talking with your neighbor, doodling, or generally not paying attention, then completing this work may be a challenge.

LO (Homework) Complete the 6 Reflections on the handout.

You may attempt to do the 6 TRANSLATIONS using the steps below if you feel comfortable with the concept.

Steps to Draw a REFLECTION

1. Read the rule and identify and DRAW the MIRROR LINE for the problem.

2. Count "TO" and "AWAY" from the MIRROR LINE and mark the new IMAGE for each original point.

3. CONNECT the image points to create the reflected image.

Steps to Draw a TRANSLATION

1. Use the coordinate points given to count along the X-axis and/or Y-axis.

x y

( 6, 3 ) means move 6 spaces right (along the x-axis) and 3 spaces up (along the y-axis)

( -2, -4 ) means move 2 spaces left (along the x-axis) and 4 spaces down (along the y-axis)

2. Mark the new image point.

3. Connect the new image points to create the translated image.

Things you should know: I have added several links to help understand each concept!

**TRANSFORMATION**- an object is TRANSFORMED (changed) when you change its

__POSITION__or

__SHAPE__.

Tranformations explained (Check out this link)

**There are 3**

__types__of Transformations.1.

**REFLECTION**

An object is Reflected when it is Flipped onto the other side of the

**MIRROR LINE.**

A MIRROR LINE is usually drawn as a dotted line.

When you REFLECT the original figure, the new figure is called the

**IMAGE**.

A link on Reflections

2.

**ROTATION**

When an object is rotated, it undergoes a turning movement around a specific point known as the

**CENTER OF ROTATION**

Basic example of Rotation

**Rotational Symmetry**- The image will look identical more than once during a full rotation of 360 degrees.

Link on Rotational Symmetry

**Order of Rotational Symmetry**- The number of times and object looks the same in one complete rotation.

THINK ABOUT WHAT THESE MEAN...

Order of rotational symmetry depends upon the number of equal sides that a regular polygon has.

**Examples of Order of Rotational Symmetry**

- A square has rotational symmetry of order 4.
- A rectangle has rotational symmetry of order 2.
- An equilateral triangle has rotational symmetry of order 3.

3.

**TRANSLATION**- Translations occurs when an object SLIDES to a new position and does not involve rotation or reflection.

A link on Translations

We have got to get very good at reading through the Chapter material and knowing and understanding the concepts...YOU HAVE TO BE AN ACTIVE LEARNER!!