Question

give an example of a regular quadrilateral​

Answer 1

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Square

Answer 2

Answer:

Square (regular quadrilateral): all four sides are of equal length (equilateral), and all four angles are right angles. An equivalent condition is that opposite sides are parallel (a square is a parallelogram), and that the diagonals perpendicularly bisect each other and are of equal length.

Internal angle (degrees): 90° (for square and rectangle)

Schläfli symbol: (for square)