$A$ polygon has $54$ diagonals. The number of sides of this polygon is

If the number of diagonals of a regular polygon is $35$,then the number of sides of the polygon is

$A$ polygon has $44$ diagonals. Then the number of sides of the polygon is:

If all the six-digit numbers $x_1 x_2 x_3 x_4 x_5 x_6$ with $0 < x_1 < x_2 < x_3 < x_4 < x_5 < x_6$ are arranged in increasing order,then the sum of the digits in the $72^{\text{th}}$ number is $............$.

$A$ regular polygon has $170$ diagonals. Then the measure of the interior angle of the polygon is

If in a regular polygon the number of diagonals is $54$,then the number of sides of this polygon is