………….is a regular quadrilateral.
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Answer:
Square
Step-by-step explanation:
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)
Edges and vertices: 4
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