-A polygon is closed shape with straight sides and examples of polygons and not polygons
-The following names and number of sides/vertices shapes:
-Triangle(3 sides)
-Square, Rectangle, Rhombus, Trapezoid (4 sides)
-Pentagon (5 sides)
-Hexagon (6 sides)
-Octagon (8 sides)
-Decagon (10 sides)
-The above shapes can be regular shapes (as we expect them to look) or irregular
-A quadrilateral is any polygon with 4 sides (e.g., square, rectangle, trapezoid)
-Shapes can be made from other shapes (e.g., a hexagon can be made from 3 rhombus, or 6 triangles, 2 two trapezoids)
-How to sort shapes by the number of sides/vertices
-Geometric(e.g., number of sides) vs. non-geometric properties (colour, size, texture)
A little extra your child may have learned but is not necessarily required***:
-Shapes: Heptagon(7 sides), and Nonagon (9 sides)
-A parallelogram is a quadrilateral with two sets of parallel sides (e.g, a square)
-A trapezoid is a shape with one set of parallel sides (and they are not all the
standard shape we all "trapezoid")
-A right angle triangle is one with a right angle (a corner like a square)
-An equilateral triangle is a triangle with all equal sides
***This information can be added to answers to show their additional knowledge. For example, when asked to explain everything you know about a square you can say it's a parallelogram as well as a quadrilateral and explain how you know it's a parallelogram.