An equilateral triangle.
An Isoceles triangle has two equal sides and two equal angles (though all triangles have three angles)
An irregular pentagon.
A shape with six sides is a hexagon. A hexagon with all sides and angles equal is a regular hexagon.
A 2D object with four equal sides is a square. In addition to having equal side lengths, a square also has four right angles, making it a specific type of rectangle. All sides being equal and the angles being 90 degrees are defining characteristics of a square.
An irregular quadrilateral.
An equilateral triangle.
An Isoceles triangle has two equal sides and two equal angles (though all triangles have three angles)
An isosceles triangle would fit the given description
equilateral square or triangle
rhombus
Squares
A scalene triangle is one example.
a irregular polygon and rhombus
Squares
An irregular pentagon.
A shape with six sides is a hexagon. A hexagon with all sides and angles equal is a regular hexagon.
Well its still a 2d because its like a normal square