1. Polygons
By Ryan

2. Polygon
The definition of a polygon is a plane figure with at least three sides and angles,typically five or more

3. Trapezium
In this shape you have 4 lines,2 acute angles and 2 obtuse angles.
Also the length of the trapezium can be any length but it has to intersect at the four points.
The trapezium is not a parallelogram.
The two side lines are not parallel but the two other lines are parallel

4. Rectangle A rectangle is a parallelogram.
The rectangle has 2 long sides and 2 short sides.
All of the angles are right angles.
Also the sides of the rectangle are parallel to the opposite side.
There is no irregular rectangle.

5. Triangle A triangle is not an parallelogram.
There are three sides in a triangle.
For the angle there it depends on the type of triangle.
There also 4 types of triangles(scalene,isosceles, right-angle and equilateral triangle.

6. Pentagon A pentagon is not a parallelogram.
It has five edges and five vertices.
The angles in a pentagon is an obtuse angles.
The lines in the pentagon are not the same length.

7. Dodecahedron An dodecahedron isn’t a parallelogram.
It has 12 sides and corners.
The angles are all obtuse
The lines are all the same length.

8. Octagon An octagon is not a parallelogram.
An octagon has 8 sides and 8 corners.
All of the angles on a octagon are obtuse.
There are 8 lines of symmetry.

9. Heptagon A heptagon is not a parallelogram.
It has 7 edges and corners.
The angles are 1 acute and 6 obtuse.
There are 7 lines of symmetry.

10. Square A square is a parallelogram. It has 4 sides and corners.
All of angles are right angles.
There are 4 lines of symmetry.
there can’t be a irregular square.

11. Hexagon A hexagon is not a parallelogram. It has 6 sides and corners.
The hexagon has 6 lines of symmetry.
All of the angles are obtuse.