An acute triangle may have three, two, or no congruent sides.
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An acute triangle has all angles less than 90 degrees. Nothing is said about the sides; it may or may not have sides that are congruent.
If it's an equilateral triangle then its 3 sides are congruent but if it's an isosceles triangle then only 2 of its sides are congruent
No because only 2 of its 3 sides are congruent in an isosceles triangle but all 3 sides of an equilateral triangle are congruent.
No, none of the sides or angles are congruent in a scalene triangle. All three sides (and all three angles) are congruent only in an equilateral triangle.
Only an equilateral triangle are all sides congruent