Easy! Squares have right angles (90)
D = Degrees
90 is a right angle (Square)
180 is a straight line (Horizontal line)
270+ Reflex angle (A Pac-man Shape)
90x4= 360 - a square has 360 altogether
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4 90 degree angles
square
Rectangle and square (which is a special kind of rectangle).
a square as it is the only parallelogram with all four sides of equal length and all four angles are right angles
A square has 4 equal sides with 4 right angles.