Which statements are true about polygons? check all that apply. all sides and all angles in a polygon are congruent. the sides of a polygon are segments that intersect exactly two other segments, one at each endpoint. in a polygon, all segments with a common endpoint are collinear. if all of the sides of a convex polygon are extended, none of them will contain any points that are inside the polygon. the extension of at least one side or diagonal in a concave polygon will contain a point that is inside the polygon.

True statements are:

The sides of a polygon are segments that intersect exactly two other segments, one at each endpoint

If all of the sides of a convex polygon are extended, none of them will contain any points that are inside the polygon

The extension of at least one side or diagonal in a concave polygon will contain a point that is inside the polygon

Step-by-step explanation:

* Lets explain what is the polygon

- The polygon is any figure has at least 3 sides

- Every polygon is either convex or concave

- A convex polygon is a polygon with all its interior angles less

 than 180°

- All the diagonals of a convex polygon are inside the polygon

- Regular Polygons are always convex

- All concave polygons are irregular

- The polygon is concave if at least one of its internal angles is greater

 than 180°

- In a concave polygon, at least one diagonal passes outside the figure.

- A concave polygon must have at least four sides

* Now lets find the true statements about the polygon

- All sides and all angles in a polygon are congruent ⇒ Not true

 (Regulars polygons only have equal sides and equal angles)

- The sides of a polygon are segments that intersect exactly two other

  segments, one at each endpoint ⇒ True

- In a polygon, all segments with a common endpoint are

 collinear ⇒ Not true

 (collinear means the angle between them is 180°)

- If all of the sides of a convex polygon are extended, none of them

 will contain any points that are inside the polygon ⇒ True

- The extension of at least one side or diagonal in a concave polygon

 will contain a point that is inside the polygon ⇒ True

# Look to the attached figures for more understand