Question

A quadrilateral has__________ diagonals.

Answer 1

A quadrilateral has two diagonals.

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Answer 2

Answer:

A quadrilateral have 2 diagonals.

Step-by-step explanation:

A number of diagonals in a polygon

$= \frac{n(n - 1)}{2}$

$(where \: n \: is \: a \: \\ number \: of \: polygon \:sides)$

$therefore \\ number \: of \: diagonal \: in \\ quadrilateral$

$= \frac{4(4 - 1)}{2}$

$= 4 \times \frac{1}{2}$

$= 2$

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