# UnMessUpable Figures 1

- Author:
- Jason Isaacs

## Using Shape 1, complete the following tasks. Write down your thoughts in your notebook.

1) Without any measurements, identify the shape.
2) Label each vertex and measure all four angles.
3) Drag one point - will it always maintain its basic structure?
4) Continue to repeat Step #3 until you've tried all vertices!

## Shape 1

## Using Shape 2, complete the following tasks. Write down your thoughts in your notebook.

1) Without any measurements, identify the shape.
2) Label each vertex and measure all four angles.
3) Drag one point - will it always maintain its basic structure?

Shape 1 is "*MessUpAble*" where Shape 2 is considered to be "*UnMessUpable*."
Based on what you observed in these sketches, come up with your own working definition of: **UnMessUpAble**

When a shape is **UnMessUpAble**, certain information is an __invariant__.
a) Define __invariant
__ b) Identify ALL parts of Shape 2 that remain as an __invariant__.