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What are concave?

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Anonymous

∙ 11y ago
Updated: 8/16/2019

A concaved shape is one that is curved like the inner surface of a sphere. (Think about something that is cave-like.)

The opposite, a convex surface, is one that is shaped like the outer surface of a sphere.

So the mirror in a telescope has a concaved surface, as does the inside of a bowl and the surface of a crater or valley.

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∙ 11y ago
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