An equilateral triangle.
Not possible ! If the shape has four right-angles, at least two sides must be the same length.
Rhombus: A Rhombus has four congruent sides but no right angles.
An equilateral triangle. Since the angles are automatically congruent, it could also be called regular.
A shape with more than four sides, but has four right angles. There is no name for it.
It's a rectangle. A rectangle has four right angles, but only two pairs of equal sides.
A rhombus
It is a rhombus, and its name is Rhobert.
A rhombus.
rhombus
Trapezoid.
A parallelogram.
A square.