Let A denote the 39 set of quadrilaterals having two diagonals equal and bisecting each other Let B ...........

Quantitative Aptitude (CDS) Coordinate Geometry

Let A denote the 'set of quadrilaterals having two diagonals equal and bisecting each other. Let B denote the set of quadrilaterals having diagonals bisecting each other at 90°. Then A∩B denotes

the set of parallelograms

the set of rhombuses

the set of squares

the set of rectangles

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Explanation:

Remember:The diagonals of the square and rectangle are equal and bisect each other
A = {Square, Rectangle}
The diagonals of square and rhombus bisect each other at 90°
B = {Square, Rhombus}
∴ A ∩ B={Square}
Thus, A∩B denotes the set of squares.