Question :

Which statements are true? If all angles of a quadrilateral are right angles, then the quadrilateral must be a square. Two shapes are similar if and only if their corresponding angles are equal. All quadrilaterals have four sides, and the sum of all angles in a quadrilateral is 180. If the diagonals of a quadrilateral are perpendicular bisectors, then the quadrilateral must be a rhombus. There are three vertices in a triangle, or there are four sides in a pentagon. Any two triangles are either similar or congruent.

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