
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 vectors $\overrightarrow {m} = (\sin A, \frac {1}{2})$ and $\overrightarrow {n} = (3, \sin A+ \sqrt {3}\cos A)$ are collinear, where A is on interior angle of $\triangle ABC$.
(1) Determine the measure of angle A.
(2) If $BC = 2$, find the maximum value of the area $S$ of $\triangle ABC$ and determine the shape of $\triangle ABC$ when $S$ is maximized.

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