A rhombus
If a parallelogram has all four sides the same length it's called a square.
A square or a rhombus
A rhombus has 4 congruent sides, that is the sides are all the same length (as in a square). In a parallelogram, that is not the case.
Rhombus, or square if there is a right angle.
A square.
A square or a rhombus.
A rhombus
If a parallelogram has all four sides the same length it's called a square.
an equilateral triangle;)
A square or a rhombus
Technically it is because a rhombus is a parallelogram that has four sides of equal length in the same way that a square is technically a rectangle that has four sides of equal length.
It is a special type of parallelogram, because all the sides are the same length. Rhombus is to parallelogram as square is to rectangle.
A rhombus has 4 congruent sides, that is the sides are all the same length (as in a square). In a parallelogram, that is not the case.
A square. Or an equilateral parallelogram.
A square.
Rhombus, or square if there is a right angle.