Any number from 1 to 178 degrees, on a flat surface.
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The correct answer is any number in the open interval (0, 180). An angle can be 0.0001 degrees or 179.9999 etc.
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Obtuse triangle
A triangle with the third angle that measures 30 degrees.This triangle is not isosceles nor equilateral but has one obtuse angle.
A right angle triangle has 2 acute angles that add up to 90 degrees, along with 1 right angle of 90 degrees.
An obtuse triangle has one angle greater than 90 degrees.
A Right Triangle or sometimes called a Right-angled Triangle has one angle = 90 degrees