Fill in the blanks:
A quadrilateral has _________diagonals?

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Solution

The number of diagonals in a polygon $= \frac{n (n - 3)}{2},$ where n is the number of polygon sides.

Therefore,number of diagonals in quadrilateral $= \frac{4 (4 - 1)}{2} = 4 * \frac{1}{2} = 2$

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(i) A quadrilateral has ___ sides.
(ii) A quadrilateral has ___ angles.
(iii) A quadrilateral has ___ vertices, no three of which are ___.
(iv) A quadrilateral has ___ diagonals.
(v) A diagonal of a quadrilateral is a line segment that joins two ___ vertices of the quadrilateral.
(vi) The sum of the angles of a quadrilateral is ___.

Q. Question 81
Fill in the blanks to make the statements true.
If the diagonals of a quadrilateral bisect each other, it is a ___.

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Fill in the blanks to make the statements true.

A diagonal of a quadrilateral is a line segment that joins two ___ vertices of the quadrilateral.

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Fill in the blanks:A quadrilateral has _________diagonals?

The number of diagonals in a polygon =n(n−3)2, where n is the number of polygon sides.Therefore,number of diagonals in quadrilateral =4(4−1)2=4∗12=2

Fill in the blanks:
A quadrilateral has _________diagonals?

The number of diagonals in a polygon $= \frac{n (n - 3)}{2},$ where n is the number of polygon sides.

Therefore,number of diagonals in quadrilateral $= \frac{4 (4 - 1)}{2} = 4 * \frac{1}{2} = 2$