
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
Five equilateral triangles, each with side length $4$, are arranged so they are all on the same side of a line containing one side of each vertex. Along this line, the midpoint of the base of one triangle is a vertex of the next. Calculate the area of the region of the plane that is covered by the union of the five triangular regions.
A) $16$
B) $18\sqrt{3}$
C) $20$
D) $16\sqrt{3}$
E) $22\sqrt{3}$

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