
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
In the diagram, \(ABCD EFGH\) is a rectangular prism. (Vertex \(H\) is hidden in this view.) If \(\angle ABF = 40^\circ\) and \(\angle ADF = 20^\circ\), what is the measure of \(\angle BFD\), to the nearest tenth of a degree?

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