
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the diagram, determine the perimeter of polygon $ABCDE$ with the following properties:
- $A = (0, 8), B = (4, 8)$  
- $C = (4, 4)$
- $D = (0, -2)$ 
- $E = (9, -2)$ 

All coordinates are given in units on the Cartesian plane.

Present the answer in LaTex format: \boxed{Your answer}
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