none, equilateral triangles have three identical angles - all acute.
None, an equilateral triangle as 3 angles of 60 degrees, which are all acute.
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An obtuse triangle can have no right angles, and has two equal angles.
A triangle can have at most one obtuse angle, but triangles do not necessarily have any obtuse angles.
No right triangle can have any obtuse angles inside it.
there is many ways to write when classifying a triangle, you can classify it by its sides or angles. When you classify it by angles you can classify it by acute, obtuse, and right triangle. when classyfing it by sides its isosceles, equilateral, and scalene!
In an equilateral triangle, all of the angles are equal, which makes them all 60 degrees. Therefore, all three angles are acute.