2-D: Isosceles triangle would be my best answer.
There isn't a 2-D shape with only two angles, so I'll assume your asking for the shape with two congruent angles and all other angles are different. That would be an isosceles triangle. One angle is unique, the other two are congruent. But, that isn't the only one. So long as a shape has an odd number of sides this can happen.
3-D: a cylinder only has two angles, and they're both right angles.
Yes. Similar figures are the same shape, but not necessarily the same size; their angles are equal.
A shape with five angles and five sides that do not all measure the same is an irregular pentagon. A regular pentagon has all five sides and angles the same size.
They are said to be congruent.
A square has all 4 sides the same length and its angles measure the same as well. A rhombus has all 4 sides the same length as well and the angles measure the same as well too.
The sides are the same length and internal angles the same
A rectangle is the only such shape. Not sure about the "little" right angles: all right angles are of the same measure.
equilateral triangle i think
square, rectangle, octagon, rentagon, hexagon, anything that's angles are the same measure.
isosceles triangle has two sides equal in length and two angles of the same measure;
Angles with the same angle measure are congruent.
Yes, congruent angles are angles that have the same measure.
A rhombus has four sides of the same length, and a rectangle has four angles of the same measure. A square has equal sides and equal angles.