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A polygon must be a closed region without any curves or arches. so you cant close one or two segments to form a polygon

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Q: Why must a polygon have 3 or more sides and angles?
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Related questions

Can a regular polygon have equal sides and equal angles?

Not only can a regular polygon have equal angles and sides, it must have them.


What is the sum of the measures of the interior angles of a 1 sided polygon?

There is no such polygon because a polygon must have 3 or more sides.


Explain how to decide if a polygon is regular or not?

A polygon is regular if:* All sides are congruent * All angles are congruent


Must a polygon have more than three sides?

A polygon must have 3 or more sides as with a triangle for example


How many sides does a regular polygon have if its interior angles are all 15 degrees?

The interior angles of a regular polygon must be 60 degrees or greater.


A certain regular polygon has exterior angles which each measure 20 degrees how many sides does this polygon have?

It has 18 sides (an octadecagon) because the number of identical angles on the polygon must always equal 360 degrees.


Is a parallelogram a irregular polygon?

Yes, a parallelogram is an irregular polygon because its sides and angles are not all the same. For a shape to be a regular polygon it must be equangular (all angles are the same) and equilateral (all sides have the same length).


What polygon has interior angles that are all obtuse?

octagon, trapezoid, pentagon...* * * * *Not true.A trapezium (or trapeziod) must have at least one acute angle.Any regular polygon with 5 or more sides has all obtuse angles. However, an irregular polygon can always have one or more non-obtuse angles (acute, right or even reflex).


A polygon with ten sides and six angles is a what?

An impossible figure in two dimensional space. A Dacagon has ten sides and must have ten angles.


When you name a polygon does the length of the sides matter?

No. Except that in a REGULAR polygon, all the sides must be of the same length and all the angles of the same measure.


How many sides in a regular polygon?

A polygon is any two-dimensional shape with a number of sides that is more than one. A regular polygon is one where all sides have the same length and all angles are equal. Actually, the number of sides needs to be more than TWO, not one. Furthermore, the sides must be straight lines.


How do you know if a poylgon is a regular polygon?

All its sides must be equal and all its angles must be equal.