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You can have one angle that is 178 degrees and the remaining two that sum to 2 degrees. A very thin triangle.
If, on the other hand, you claim that the sum of all three angles is 178 degrees then there are two possible reasons. The more likely one is that you have made a mistake. Alternatively, the triangle is on a slightly concave surface.
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The sum of all angles in a triangle is 180 degrees, so if 2 are only 1 degree, then the 3rd has 178 degrees. A verrrrry flat triangle.
more than 90 degrees and up to 180. - The first part of the above is true, but the largest side can only equal up to 178 degrees. The sum of all THREE angles equals 180 (in EVERY triangle), so, logically, a single angle in a triangle cannot be 180 degrees.
A right angles triangle, as one of the angles in the triangle is 90 degrees.
A right angled scalene triangle
A right-angle triangle