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.
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
They are said to be congruent.
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;
A line segment that has the same length is referred to as congruent line segments. Angles that have the same measure are called congruent angles. Likewise, figures that have the same size and shape are known as congruent figures. Congruence indicates that these elements are identical in measurements, even if their positions or orientations differ.
Angles with the same angle measure are congruent.
Yes, congruent angles are angles that have the same measure.