What are the dimensions of a sector in this system?

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Multiple Choice

What are the dimensions of a sector in this system?

Explanation:
In this system, the size of a sector is determined by equal angular extents in two perpendicular directions, measured in arcminutes. The grid uses a 2.5-arcminute step, so each sector spans 2.5 arcminutes in one direction and 2.5 arcminutes in the other, giving dimensions of 2.5 minutes by 2.5 minutes. Larger angular units like 1 degree (60 arcminutes) or 0.5 degree (30 arcminutes) would jump to much bigger boundaries and wouldn’t match the defined sector grid. A 5-by-5 arcminute size would also exceed the standard boundary, so the correct dimensions are 2.5 minutes by 2.5 minutes.

In this system, the size of a sector is determined by equal angular extents in two perpendicular directions, measured in arcminutes. The grid uses a 2.5-arcminute step, so each sector spans 2.5 arcminutes in one direction and 2.5 arcminutes in the other, giving dimensions of 2.5 minutes by 2.5 minutes. Larger angular units like 1 degree (60 arcminutes) or 0.5 degree (30 arcminutes) would jump to much bigger boundaries and wouldn’t match the defined sector grid. A 5-by-5 arcminute size would also exceed the standard boundary, so the correct dimensions are 2.5 minutes by 2.5 minutes.

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