A parallelogram has 0 or 2 acute angles. If the parallelogram happens to have four right-angled corners, it is still a parallelogram (and a rectangle), but no acute angles.
Not necessarily, but it can.
It has twelve angles but all of them need not be acute.
There are three acute angles in an acute triangle and they add up to 180 degrees.
three
One acute angle
0 or 4
it has no acute angles
there are three acute angles in an acute triangle, because there are three corners.
no
Not necessarily, but it can.
parallelagram
In an acute triangle, all three angles are acute.
There can be 1 or 2 acute angles.
parallelagram http://en.wikipedia.org/wiki/Parallelagram well specifically you would be a rectangle which has parallel sides like a square. a parallelogram can be a square or a rectangle because they all have parallel sides but only squares and rectangles have right angles on all sides. parallelograms have congruent sides which require acute and obtuse 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.