It could be an arrowhead (delta) or a kite.
A kite.I think that the answer is a parallelogram . Because the top and bottom are equal (that's 1 pair) and the sides are equal(2 pairs).
1 pair of 2 angles
trapezoid
An isosceles triangle has two equal angles. All the angles of a triangle add up to 180º There can not be another angle with 90º as that would mean the last angle was 0º, so the other two angles must be 45º each.
A trapezoid.
A hexagon need not have any equal angles.It can have 2, 3, 4, 5 or 6 equal angles, or 2 or 3 pairs of equal angles, or 2 triplets of equal angles or 1 pair and 1 quartet.
a parallelogram
Its diagonals are perpendicular and intersect each other at right angles or 90 degrees with 1 pair of opposite angles equal in size and 1 pair of unequal opposite angles
A trapezium.
a trapezoid
A kite.
A trapeziod.
Certain kinds of trapezoids only have one pair of equal angles. Like so... ________ |...............\ |................\ |.................\ |..................\ ---------------- See? The only congruent angles are the two right angles on the left side. (Ignore the dots, it was the only way I could get my diagram to format properly)
It could be an arrowhead (delta) or a kite.
A rhombus or a parallelogram would fit the given description providing the acute angles are equal and the obtuse angles are equal and that they all add up to 360 degrees.
A kite can have 1, 2 or 3 acute angles.