it is a square
RectangleA rectangle has 4 congruent angles, but two pairs of congruent sides instead of all sides being congruent.
There are three types of triangles. Scalene triangles have no congruent sides or angles, equilateral triangles have 3 congruent sides and 3 60degree angles, and isosceles triangles have two congruent sides and two congruent angles.
escoscolipse
4 sides
An equilateral triangle.
RectangleA rectangle has 4 congruent angles, but two pairs of congruent sides instead of all sides being congruent.
There are three types of triangles. Scalene triangles have no congruent sides or angles, equilateral triangles have 3 congruent sides and 3 60degree angles, and isosceles triangles have two congruent sides and two congruent angles.
escoscolipse
4 sides
A square, but not a rhombus because a rhombus does not have four congruent angles
An ireggular square has sides all the same lenght but all the angles are not congruent
An equilateral triangle.
Equilateral (regular)
A rhombus is a parallelogram with four equal sides. A square is a type of rhombus.
An Isosceles triangle has two sides (and two angles) congruent.
rectangle
it is impossible* * * * * Although it is impossible to have a triangle with no sides or angles congruent to anything else in the 2-d world, I suggest that the answer to this question is a scalene triangle.