
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

From the vertex $B$ of an isosceles triangle $ABC$, a height $BD$ is dropped to its base $AC$. Each of the legs $AB$ and $BC$ of triangle $ABC$ is equal to 8. In triangle $BCD$, a median $DE$ is drawn. A circle is inscribed in triangle $BDE$, touching side $BE$ at point $K$ and side $DE$ at point $M$. Segment $KM$ is equal to 2. Find angle $A$.

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