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## Main Question or Discussion Point

Dear all,

As I was reading my book. It said that the line element of a particular coordinate system (spherical) in [itex]R^{3}[/itex] is so and so. Then it said that the metric is flat. I don't get how the metric is flat in spherical coordinate. Could someone shed some light on this please?

Thanks

As I was reading my book. It said that the line element of a particular coordinate system (spherical) in [itex]R^{3}[/itex] is so and so. Then it said that the metric is flat. I don't get how the metric is flat in spherical coordinate. Could someone shed some light on this please?

Thanks