An arrowhead perhaps
Acute angles at the tip and two where the edge turns back, a reflex angle where it meets the shaft.
an arrowhead has 4 angles. but no, you can't make an arrowhead out of only right angles.
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.
Two or three.
Depends. Most of the time the angles are acute or obtuse
An arrowhead perhaps
Acute angles at the tip and two where the edge turns back, a reflex angle where it meets the shaft.
It depends on they type of arrowhead you have. If it is a arrowhead in the shape of a directional arrow, there are no obtuse angles. The most possible obtuse angles is 1.
The arrowhead has zero right angles.
A bit like a chevron or an arrowhead.
an arrowhead has 4 angles. but no, you can't make an arrowhead out of only right angles.
it has no acute angles
there are three acute angles in an acute triangle, because there are three corners.
In an acute triangle, all three angles are acute.
There can be 1 or 2 acute angles.