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Cartoon Similarity. Using cartoons to draw similar figures. The Cartoon. What to do with your cartoon : cut around the edges of your cartoon so that they are straight ( use a ruler to create a border if it doesn’t have one ). The Cartoon. After you cut out the cartoon :

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cartoon similarity

Cartoon Similarity

Using cartoons to draw similar figures

the cartoon
The Cartoon

What to do with your cartoon:

cut around the edges of your cartoon so that they are straight

(use a ruler to create a border if it doesn’t have one)

the cartoon3
The Cartoon

After you cut out the cartoon:

Glue your cartoon to a white sheet of paper – in one of the corners, but not right against edge

like this…

the grid
The Grid

Use a ruler to measure the length and width of your cartoon in centimeters and write it on your paper – near your cartoon

5cm

Yours may not be 5cm – this is just an example

5cm

the grid5
The Grid

Now…Time to draw the grid!

On the paper (not on the cartoon), Make one centimeter marks on opposite sides

Start on the left and go towards the right across the top and bottom

Be careful measuring – your grid will turn out better

the last block may be smaller than one centimeter

1cm 1cm 1cm 1cm 1cm

1cm

1cm

1cm

1cm

1cm

the grid6
The Grid

Now…Time to draw the grid!

Connect the marks…

BE careful you have one shot at this!

1cm 1cm 1cm 1cm 1cm

It is okay if all your squares aren’t exactly the same size – but try to get them as close as possible

1cm

1cm

1cm

1cm

1cm

the scale drawing
The Scale Drawing

Time to blow up your cartoon. The scale factor is 4. You are making your cartoon 4 times as large. What do you do?

1cm 1cm 1cm 1cm 1cm

1cm

1cm

1cm

1cm

1cm

multiply everything by four!

the scale drawing8
The Scale Drawing

You need to create a grid that is four times as large as your original. My original is 5cm by 5cm. You have a choice here: You can choose a scale of 1cm to 4cm, or you can make it huge and go from 1cm to 4in

the cartoon9
The Cartoon

Depending on how big your cartoon is, you may need to add paper to your original sheet

the drawing
The Drawing

To draw the large grid you need to multiply the length and width of the small cartoon by four and then draw a new large square or rectangle

the scale drawing11
The Scale Drawing

You need to create a grid that is four times as large as your original. My original is 5cm by 5cm. I’m choosing 1cm to 4cm, so my new grid is 20cm to 20cm

Now mark off 4cm marks! – Left to right and top to bottom

the drawing12
The Drawing

Now you can draw! You do not have to know how to draw to do this. The grid helps you with spatial relationships…

the drawing13
The Drawing

Now you can draw! You do not have to know how to draw to do this. The grid helps you with spatial relationships…

Draw the new picture one square at a time

Notice spatial relationships here and it will look Exactly like original

cartoon similarity14
Cartoon Similarity

Finished Product

questions
Questions

Write the questions and then answer them on your scale drawings – use your text to help.

1. How does the scale factor affect the size of a shape or figure?

2. What is a dilation? How does it relate to scale drawings?

3. Is a dilation an Isometry? Why or Why Not?