some properties that only have squares are that all 4 sides are equal. it relates to rhombuses because they both have 4 sides and squares are rhombuses. rectangles also have 4 sides and squares are rectangles too. all parallelograms have 4 sides. squares can be all of the above shapes but the other shapes are not always squares. the grey angle is 90 degrees and the pink angle is 45 degrees. the grey is 90 because the angle is shaped like an L meaning it’s a right angle as well. the pink is 45 (half of 90) because it’s a diagonal exactly splitting the L in half. sorry for my bad explanations. :((
