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प्रश्न
Let F1 be the set of all parallelograms, F2 the set of all rectangles, F3 the set of all rhombuses, F4 the set of all squares and F5 the set of trapeziums in a plane. Then F1may be equal to
विकल्प
(a) \[F_2 \cap F_3\]
(b) \[F_3 \cap F_4\]
(c) \[F_2 \cup F_3\]
(d) \[F_2 \cup F_3 \cup F_4 \cup F_1\]
उत्तर
We know that every rectangle, rhombus and square in a plane is a parallelogram but every trapezium is not a parallelogram.
So, F1 is either of F1 or F2 or F3 or F4.
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