Using Geometers Sketchpad. WHAT HAPPENS IN A RIGID TRANSFORMATION? A.Shape changes size and position B.Shape changes size but not position C.Shape changes.

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Presentation transcript:

Using Geometers Sketchpad

WHAT HAPPENS IN A RIGID TRANSFORMATION? A.Shape changes size and position B.Shape changes size but not position C.Shape changes position but not size D.Shape doesn’t change at all

WHAT ARE THE 3 TYPES OF RIGID TRANSFORMATIONS? A.Rotation, Reduction, Reflection B.Translation, Reflection, Dilation C.Rotation, Reflection, Translation D.Reflection, Rotation, Dilation

WHAT TRANSFORMATION WAS ILLUSTRATED IN THE PICTURE? A.Rotation B.Reflection C.Translation

WHAT TRANSFORMATION WAS ILLUSTRATED IN THE PICTURE? A.Rotation B.Reflection C.Translation

WHAT TRANSFORMATION WAS ILLUSTRATED IN THE PICTURE? A.Rotation B.Reflection C.Translation

Work cooperatively in groups Explore what happens in each type of transformation Use the program GeoGebra to make our discoveries Make predictions Record findings Reflect on experience If there is time… Create fractals using transformations TODAY WE WILL …

USING GEOSKETCHPAD Segment Tool Arrow Tool Transformations Point Tool Open a new sketch: Go to File: New Sketch Arrow Tool is your default tool. Use the Arrow Tool to select points. Label Tool Measuring Tools

LETS PRACTICE

Follow the directions on your sheet Record all measurements in journal Determine a definition Draw an illustration NOW IT’S YOUR TURN

RECORD INFORMATION IN YOUR JOURNAL

WHAT DID WE DISCOVER?

Distance: A,A’ _____ B,B’ _____ C,C’ _____ Dragging the point what happened? TRANSLATION

A transformation that _______ each point of a figure the same _________ and in the same _______. TRANSLATION slides distance direction

CAN YOU FIND A TRANSLATION IN THE TILE?

Distance: A,A’: _____ B,B’: _____ C,C’: _____ ROTATION ANGLES: <ADA’: _____ <BDB’: _____ <CDC’: _____

A transformation that _______ a figure ________ a point. The angle measurement between ____________________ and the _________________ are the _____. ROTATION turns around corresponding points center of rotation same

CAN YOU FIND A ROTATION IN THE TILE?

LETS CREATE THE REFLECTION TOGETHER

Distance: A,A’: _____ B,B’: _____ C,C’: _____ REFLECTION ANGLES: <ADA’: _____ <BDB’: _____ <CDC’: _____

REFLECTION A transformation that _____ a figure across the line of _________ forming a _____________ bisector with the segment joining the ___________________. flip reflection perpendicular corresponding points

CAN YOU FIND A REFLECTION IN THE TILE?

TRANSFORMATION GAME Player 1 spins arrow and lands on red a. Look at key b. Reflect up one block c. Rotate 90 counter- clockwise d. Translate diagonally

FRACTAL TILES

Geometric figures built up from a simple shape by repeating the same changes at smaller and smaller scales. (recursion) WHAT ARE FRACTALS?

Self-similar objects that look the same no matter to what stage you zoom. WHAT ARE FRACTALS?

FRACTALS CAN BE FOUND IN … MOVIES TECHNOLOGY ARCHITECHTURE NATURE

Creating stage 1 Translation Translate one tile up Translate one tile right

Creating stage 1 Rotation Rotate the top 90 degrees clockwise Rotate the bottom right 90 degrees clockwise

Creating stage 2 Translation Translate one grid up and one grid to the right

Rotate top 90 Rotate bottom right 90

To create Stage 3 repeat the process