It definitely did have a base, but, as far as I remember, there is nowhere in bavli, yerushalmi, medresh rabba or tanchuma, or breisa d’meleches hamishkan that says that it was semi-circular (or any other shape).
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It definitely did have a base, but, as far as I remember, there is nowhere in bavli, yerushalmi, medresh rabba or tanchuma, or breisa d’meleches hamishkan that says that it was semi-circular (or any other shape).