No.
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An obtuse triangle must have two acute angles and these can be congruent.
A scalene triangle can have an obtuse angle and two different acute angles.
Equilateral triangle = All sides congruent Scalene triangle = No sides congruent Isosceles triangle = At LEAST two sides congruent Right triangle = Triangle with one right angle Obtuse triangle = Triangle with ONE obtuse angle Acute triangle = Triangle with ALL acute angles
Yes if it is in the form of an isosceles triangle with the other 2 acute angles being equal
In any right triangle, the two angles at either end of the hypotenuse are both always acute angles. But I don't think that would be called an 'acute' triangle, because an acute triangle is one in which all three angles are acute ones.