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Q: How many diagonals are in a polygon with 18 sides?
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How many sides does an irregular polygon have if it has 135 diagonals?

Let the number of sides be x and by solving the equation for diagonals 0.5(x*x-3x) = 135 the solution is -15 or 18 and so therefore it has 18 sides irrespective if it is an irregular or a regular polygon


How many diagonals can you draw in a polygon with 18 side?

153 diagonals.


How many diagonals can be drawn from any vertex of a 20-sided polygon?

It is 18 diagonals


How many sides does a 2880 polygon have?

A polygon whose interior angles are 2880 degrees has 18 sides.


If the exterior angle of a regular polygon is 20 how many sides does the polygon have?

It has 360/20 = 18 sides


How many sides does a polygon have if its exteroir angles are 18 degrees?

360/18 =20 sides.


If each angle of a polygon is 160 degrees how many sides does it have?

18 sides


How many triangles are in a 20 sided polygon?

18. If a polygon has n sides, then it has n-2 triangles.There are 18 triangles in a 20 sided polygon.


How many sides does a regular polygon have if the measure of an exterior angle is 18?

360/18 = 20 sides


How many sides does a regular polygon have if the measure of an angle is 160?

No regular polygon has 160. The "smallest" polygon is the triangle, which has 180o. ^^FALSE!!!!!!! this polygon has 18 sides!


How many sides does a regular polygon have that has an angle of rotation equal to 18 degrees?

If you mean a polygon with equal exterior angles of 18 degrees then it will have 360/18 = 20 sides.


If a polygon has an exterior angle of 18 how many sides does it?

360/18 =20