Square, Rectangle, Right Triangle...
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If the angle is over 90 degrees the angle is obtuse, smaller than 90 degrees the angle is acute and over 180 degress the angle is a reflex angle
The Right Angle.
I think you can tell if a shape has a square corner by seeing if the corner has a 90 degree angle. If it is 90 degress than it is a square corner.
Because of the angle was different. Name three kinds of angles there. Among them: right-angled (90 degress), obtuse angle (more than 90 degress), and acute angle (less than 90 degress).
90°