None they all ALL different!
It has one pair of opposite angles that are equal but not two.
only if it is an equilateral triangle
The arrowhead has zero right angles.
Two or three.
It could be an arrowhead (delta) or a kite.
It has one pair of opposite angles that are equal but not two.
yes
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.
only if it is an equilateral triangle
Yes. The two angles on either side of the reflex angle are normally equal.
The arrowhead has zero right angles.
A kite or an arrowhead.
an arrowhead has 4 angles. but no, you can't make an arrowhead out of only right angles.
No but as a 4 sided quadrilateral its 4 interior angles add up to 360 degrees
The 'classic' arrow-head shape has 7 angles.
This is an arrowhead quadrilateral.
Two or three.