it has no acute angles
In an acute triangle, all three angles are acute.
There can be 1 or 2 acute angles.
there are three acute angles in an acute triangle, because there are three corners.
It has twelve angles but all of them need not be acute.
The letter "N" as two acute angles.
There are three acute angles in an acute triangle and they add up to 180 degrees.
None: a circle has no angles, and certainly no acute ones.
One acute angle
There are no acute angles in a rectangle which has 4 equal interior right angles