A decagon is a ten sided figure (usually a regular ten sided figure with all interior angles equal and all sides equal in length) A polygon is a closed planar figure bounded on all sides by straight lines. A polygon can have any number (greater than two) of sides.
The interior angles of a triangle always add up to 180°Because the interior angles always add to 180°, every angle must be less than 180°The bisectors of the three interior angles meet at a point, called the incenter, which is the center of the incircle of the triangle.Note The interior angles only add to 180° when the triangle is planar, meaning it is lying on a flat plane. If the triangle is not planar, for example if it is lying on the curved surface of a sphere, the angles do not add to 180°.
The bond angles are 120 degrees
120 degrees
NO!!!! The word 'polygon' means a planar figure of any number of sides. A parallelogram is a planar figure of four(4) sides.
A decagon is a ten sided figure (usually a regular ten sided figure with all interior angles equal and all sides equal in length) A polygon is a closed planar figure bounded on all sides by straight lines. A polygon can have any number (greater than two) of sides.
http://www.base2.it/img/floor.JPGAn irregular polygon is a closed planar figure which has sides that are not equal and/or angles that are not equal.
Quadrilateral
Planar figures
The interior angles of a triangle always add up to 180°Because the interior angles always add to 180°, every angle must be less than 180°The bisectors of the three interior angles meet at a point, called the incenter, which is the center of the incircle of the triangle.Note The interior angles only add to 180° when the triangle is planar, meaning it is lying on a flat plane. If the triangle is not planar, for example if it is lying on the curved surface of a sphere, the angles do not add to 180°.
parallelogram is a special kind of quadrilateral which, in turn, is a special kind of polygon and that is a closed planar figure.
The bond angles are 120 degrees
If "colsed" is meant to be "closed", and if the figure is planar (flat), and if the sides of the figure do not cross, then it is a polygon. But answer to the question could include shapes such as stars (pentagrams) which are not polygons..
A closed planar figure with four right angles. This makes opposite sides parallel and of equal length and of course adjacent sides "normal" to each other ('normal' in geometry means at right angles). There is an inside and an outside. The center of gravity lies at the intersection of the diagonals and the intersection of the lines connecting opposite midpoints.
The term planar means having a two dimensional characteristic. A polygon is a planar figure.
120 degrees
It is called a face.