There must be 2 of them.
-- The 3 angles inside a triangle always add up to 180 degrees.
-- An obtuse triangle has one angle that's greater than 90 degrees.
-- That leaves less than 90 degrees total for the other 2 angles.
-- So they must be less than 90 degrees apiece.
-- In other words, "acute angles".
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3. Any triangle, whether it's obtuse or acute will always have 3 angles. Pink23
It doesn't matter if a triangle is isosceles, scalene, obtuse, acute... There are always 3 angles in a triangle (which add up to 180).
It has 1 obtuse angle and 2 acute angles and the 3 interior angles add up to 180 degrees
It can have 0 or 2 right angles, 1 or 2 acute or obtuse angles.
none, equilateral triangles have three identical angles - all acute.None, an equilateral triangle as 3 angles of 60 degrees, which are all acute.