Cartoon Similarity Using cartoons to draw similar figures

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

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

The Grid Now…Time to draw the grid! On the paper (not on the cartoon), Make one centimeter marks on opposite sides 1 cm 1 cm 1 cm 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

The Grid Now…Time to draw the grid! Connect the marks… BE careful you have one shot at this! 1 cm 1 cm 1 cm It is okay if all your squares aren’t exactly the same size – but try to get them as close as possible

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? 1 cm 1 cm 1 cm multiply everything by four!

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

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

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 Drawing You need to create a grid that is four times as large as your original. My original is 5 cm by 5 cm. I’m choosing 1 cm to 4 cm, so my new grid is 20 cm to 20 cm Now mark off 4 cm marks! – Left to right and top to bottom

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 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 Similarity Finished Product

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?