
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
Given an isosceles trapezoid $ABCD$, the bases $AB = 10$ units and $CD = 18$ units, and the non-base sides $AD$ and $BC$ are equal in length. The height from $AB$ to $CD$ is $4$ units. Determine the perimeter of $ABCD$.

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