A square and a rhombus both have 4 congruent sides but a square has 4 equal interior right angles whereas a rhombus has 2 obtuse and 2 acute interior angles
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All trapezoids must be quadrilateral. And, as the name suggests a quadrilateral has four sides.
A quadrilateral has four angles. There are always the same number of angles as there are sides, so since a quadrilateral has four sides it must also have four angles.A quadrilateral doesn't "do" any angles. However, it has four angles. (If that is what you wanted to know.)
No. A quadrilateral only must have four sides; those four sides can be arranged on any angle that permits the four sides to also have four angles.
No: the very nature of the word "quadrilateral" tells you that there must be four sides. "Quad" is a prefix meaning "four".
a square or a rhombus