Two angles are adjacent if they have the same vertex, share a side and do not overlap. It is, therefore, perfectly possible for two obtuse angles to be adjacent. In fact, every pair of adjacent angles in a hexagonal tessellation (a honeycomb, for example), consists of a pair of obtuse angles (120 degrees).
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Angles larger than a right angle and smaller than two right angles (between 90° and 180°) are called obtuse angles("obtuse" meaning "blunt").
Two adjacent angles are considered supplementary angles. They aggregate and make an angle that measures 180 degrees.
A triangle can have one obtuse angle and two acute angles. The sum of all three angles must equal 180 degrees.
38 is an acute angle and 105 is an obtuse angle
It ha one right angle, two obtuse angles and one acute angle