It is an application that answers the open angle when a fan-shaped figure is displayed.
There are two question formats.
[Fixed reference line]
The reference line is fixed (3 o'clock direction).
[Variable reference line]
The reference line moves from problem to problem.
There are two question formats.
[Fixed reference line]
The reference line is fixed (3 o'clock direction).
[Variable reference line]
The reference line moves from problem to problem.
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