All of the angles in a triangle must add up to exactly 180 degrees. 89, 90, and 91 degrees equal up to 270 degrees. So these angles are not characteristics of a triangle.
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A right angles triangle, as one of the angles in the triangle is 90 degrees.
its just called a right triangle. one angle is 90 degrees and two other angles are 1-89 degrees.
Acute Triangle - All of the angles are under 90 degrees. Right Triangle - One angle is 90 degrees Obtuse Triangle - A triangle that has one angle greater than 90 degrees
It is impossible for a triangle to have 2 angles of 90 degrees
there can be only one angle measuring more than 90 degrees.. as sum of angles in a triangle is 180 degrees. all the angles cannot exceed 90. A triangle in which one angle is greater than 90 degrees is an obtuse angled triangle