I found this image: in this blog-post.
There are two corners in the image: the leftmost is an "inside corner" and the rightmost is an "outside corner".
Are there single words (nouns) that can be used for "inside corner" and "outside corner"?
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I am thinking of a one-word noun for each and I couldn't think of anything. However, you might find this useful: concave and convex (corners).This image is from the link: