An infinite number. A polygon with any number of sides can be equilateral (ie have sides of equal length).
A rhombus has 4 sides of equal lengths
None but it has end sides of equal lengths
An isosceles triangle has 3 sides and 2 of its sides are equal in lengths
There are infinitely many 2d shapes. They can have 1 side (a circle or ellipse) to infinitely many. They can have sides that are straight or not, the sides can be equal or unequal in length, the angles can be equal or unequal, etc.
It has two pairs of equal length (congruent) sides. The top two are equal and the bottom two are equal (when you draw it like a diamond shape)
2
A rhombus has 4 sides of equal lengths
3
3 or more sides of equal lengths
None but it has end sides of equal lengths
An isosceles triangle has 3 sides and 2 of its sides are equal in lengths
A rhombus has 4 equal sides
None but two of its three sides are equal in lengths.
There are infinitely many 2d shapes. They can have 1 side (a circle or ellipse) to infinitely many. They can have sides that are straight or not, the sides can be equal or unequal in length, the angles can be equal or unequal, etc.
None normally unless it is an isosceles trapezoid which has ends of equal lengths
It has two pairs of equal length (congruent) sides. The top two are equal and the bottom two are equal (when you draw it like a diamond shape)
An isosceles triangle has 3 sides two of which are of equal lengths it also has 3 interior angles two of which are of equal sizes.