
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
An equilateral triangle with side  $20$  is divided by there series of parallel lines into   $400$  equilateral triangles with side  $1$ . What maximum number of these small triangles can be crossed  (internally) by one line?

Tuymaada 2017 Q7 Juniors

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