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It is not entirely clear what the question is about. The sum of the angles of a triangle on a plane surface is 180 degrees. However, on a concave surface, such as the inside of a dome, they will add to less than that and, at the appropriate curvature, they will sum to 145 degrees.

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10y ago

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They are obtuse triangles which will also have 2 acute angles and the 3 interior angles will add up to 180 degrees

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10y ago
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Obtuse angle may be the term you are looking for.

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10y ago
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Q: What kind of triangles have 145 degree?
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