A 4 sided plane figure with 4 right angles.
A four-sided plane figure with four right angles
It could be a square or a rectangle. Or you could call it a quadragon.
A square is a plane geometric figure having 4 equal sides and 4 right angles.
On octagon is a plane (2-dimensional) figure which has only one face. There are no right angles on the face of an octagon.
Internal angles of a plane figure of n sides = (2n - 4) right angles where n is 4 this gives 4 right angles ie 360 degrees
For any n-sided plane figure the interior angles total 2n - 4 right angles.
No plane geometric figure can have one acute and three right angle only, at least two other angles must be included