
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 circle has a radius of 10 units. A certain chord in the circle is perpendicular to a radius and bisects another radius of 10 units. What is the length of this chord?
A) \( 10\sqrt{3} \)
B) \( 20 \)
C) \( 15\sqrt{3} \)
D) \( 25 \)

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