A square corner is a 90° angle which is called a "Right angle".
A corner of 90 degrees is a right angle
The Greek root meaning angle or corner is "gonia."
right angle
The angle at which the car is approaching the corner
right angle
a vertex
acute andle right angle obtuse angle reflex angle
With a small square in its corner
It is a right angle trapezoid
that is an right angle
corner