
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
A ball rolled into a pool and floated on the water. Its highest point was $2 \mathrm{~cm}$ above the water surface. The diameter of the circle marked by the water surface on the ball was $8 \mathrm{~cm}$.

Determine the diameter of the ball.

(L. Hozová)

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