A square or a rectangle
a right angle
Square
A square.
Your question is a little unclear, but if you mean the small square drawn on the inside corner of a right angle: it is simply a way of showing a 90-degree angle.
It is called the right angle! Smart one!
right angle
A square corner is a 90° angle which is called a "Right angle".
A square or a rectangle
a right angle
A right angle is an internal angle equal to 90o You can tell if an angle is a right angle because it has a little symbol which is a square where the two lines meet to form the angle. A right angle is a quarter of a circle. Lines that are at a right angle are perpendicular to each other.
Square
A square.
Yes a parallelogram with a right angle is a square.
A right angle is 90 degrees. The square root of a right angle would be the square root of 90, which is 9.486.
A square has FOUR right angles. Each corner is a right angle.
Each angle in a square is a right angle, or a 90 degree angle.