
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
If $\triangle B_1B_2B_3$ is isosceles with angles $45^\circ$, $45^\circ$, and $90^\circ$ at $B_1$ and $B_2$, respectively, and $B_{n+3}$ is defined as the midpoint of the segment $B_nB_{n+1}$ for all positive integers $n$, then the measure of $\measuredangle B_{44}B_{45}B_{43}$ equals _______.
A) $30^\circ$
B) $45^\circ$
C) $60^\circ$
D) $90^\circ$
E) $120^\circ$

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