Resizing

resize image


When you resize a shape it gets bigger or smaller ...

 

... but it still looks similar:

 

Here we call it resizing, but other people call it dilation, contraction, compression, enlargement or even expansion! Same idea, just different names.

To resize, just do this for every corner:

  • draw a line from the central point to the corner
  • increase (or decrease) the length of that line
  • put a dot at the new point

Then just connect the dots for the resized shape!

resize triangle on graph

Try It Yourself

Press "Play" button.


images/resize.js

Try placing the pin in different locations, too.

 

5150, 5151, 845, 846, 2131, 2132, 3352, 3353, 3354, 3355