
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
Let  $M$  be a set of  $99$  different rays with a common end point in a plane. It's known that two of those rays form an obtuse angle, which has no other rays of  $M$  inside in. What is the maximum number of obtuse angles formed by two rays in  $M$ ?

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