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A T has eight corners. Six of these point outwards and two (the armpit) corners face inwards. In reference to a building, what is the term to describe the inward corners?

The closest I've come up with is the Axilla corners or Oxter corner but I can find no reference to those two terms ever being used outside of medicine.

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These are called inside corners. – Jim Nov 11 '12 at 6:15
I think that in this case inside is too ambiguous, since I am referring to the exterior of a building. – user23679 Nov 11 '12 at 6:17
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Think what you will, the term is inside corner and has nothing to do with whether the corner is on the exterior or interior of a building. – Jim Nov 11 '12 at 6:19
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It is inside corner. Google Images are a good source of independent confirmation, if you need it. google.co.uk/search?q=inside+corner&tbm=isch – Andrew Leach Nov 11 '12 at 8:58
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Convex and concave? – lockstock Nov 11 '12 at 9:43
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closed as too localized by Kris, Andrew Leach, tchrist, jwpat7, MετάEd Nov 12 '12 at 5:40

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3 Answers

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You can use the term obtuse corner.

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You might do, but obtuse refers to angles between 90 and 180 degrees. Most corners are right-angles. – Andrew Leach Nov 11 '12 at 15:32
A corroborating link would help this answer's cause. – coleopterist Nov 11 '12 at 18:14
Yeah, the corners of the Pentagon building are obtuse (insert obvious joke about its inhabitants) but that's not what the OP was asking. – Malvolio Nov 11 '12 at 19:17
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The least ambiguous but generally understandable I can think of is "concave" (inner) and "convex" (outer).

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There are external and internal corner beads to finish (internal) plaster joins. Same terms are used by architects.

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