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17 July, 18:00

If a quadrilateral has perpendicular diagonals, then it is a rectangle.

Which of the following arguments is valid with respect to the conditional statement premise above?

1. A quadrilateral is a rectangle.

Therefore, it has perpendicular diagonals.

2. A quadrilateral does not have perpendicular diagonals.

Therefore, it is not a rectangle.

3. A quadrilateral has perpendicular diagonals.

Therefore, it is a rectangle.

4. A quadrilateral is not a rectangle.

Therefore, it does not have perpendicular diagonals.

A. 3 and 4

B. 1 only

C. 1 and 3

D. None of the arguments are valid.

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Answers (1)
  1. 17 July, 18:04
    0
    I don't know
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