Yes, it has to in order to be a triangle.
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no
acute angles are angles that are smaller than 90 degrees. all acute angles are all angles that are less than 90degrees
It has twelve angles but all of them need not be acute.
rectangular prism all angles are acute angles yes or no? * * * * * No, none of the angles are acute. They are all right angles because each face is a rectangle and each angle in a rectangle is a right angle.
In an equilateral triangle, all of the angles are equal, which makes them all 60 degrees. Therefore, all three angles are acute.