Never. It's impossible. If there are two acute angles, it means there have to be two obtuse angles, so three acute angles is impossible.
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The question appears to relate to the angles of a triangle. 1) If angle 3 is acute then the other two angles can also be acute. In the case of an equilateral triangle all three angles are equal and acute. 2) If angle 3 is acute and one other angle is obtuse then the remaining angle is acute. 3) If angle 3 is acute and one other angle is a right angle then the remaining angle is acute.
There are 3 acute angles and 2 obtuse angles in the letter A.
It can be either acute or obtuse. An acute angle is less than 90 degrees and all 3 angles add to 180 degrees. For example, If two angles are 60 degrees (acute) then the 3rd is 60 degrees (acute). If two angles are 30 degrees (acute) the 3rd is 120 degrees (obtuse).
Every triangle must have either 2 or else 3 acute angles. The least possible is 2.
Acute angles do not have specific names.