# Sky Typing - PowerPoint PPT Presentation

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Sky Typing. http://robertkaplinsky.com/work/skytypers/. Plot points & Make a list of ordered pairs for each letter: M – A – T – H –. Would this message look different if you were viewing it from a plane above the message instead of on the ground?. UH OH –

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Sky Typing

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## Sky Typing

http://robertkaplinsky.com/work/skytypers/

Plot points & Make a list of ordered pairs for each letter:

M –

A –

T –

H –

Would this message look different if you were viewing it from a plane above the message instead of on the ground?

UH OH –

The message was supposed to be read horizontally from east to west instead of vertically from north to south.

UH OH –

The message is too small. It needs to be 50% larger!

UH OH –

This is a message for Los Angeles and they can’t see it well because it’s a few miles away. It needs to move 3 units west and 10 units north.

We’ve moved it!

Now how do we tell the computer to move from the original points to the finished points in ONE algebraic command?

### Algebraic Transformations

• Reflection across the x-axis

• 90 Clockwise Rotation about the origin

• 50% larger Dilation

• Translation 3 units left, 10 units up

• One transformation to tell the computer in ONE step