 Describe, model, draw & classify shapes;  Investigate & predict the results of combining, subdividing & changing shapes;  Develop spatial sense;  Relate geometric ideas to number & measurement ideas;  Recognize and appreciate geometry in their world.

 Geometry is the mathematics of the properties and relationships of points, lines, angles, surfaces, and solids.  In geometry, a plane is a 2-dimensional surface that is perfectly flat and infinitely large.  Plane figures are named according to the number, size, and position of their sides and angles. For example, a polygon is a closed figure whose sides are all line segments.

Polygons Not Polygons

 Make a list of all the polygons › Provide one or more pictures for each

 When we say solid figure, we don’t mean solid in the usual sense; we mean the figure is not flat, it’s three- dimensional. face base edge vertex Solid figures include prisms, pyramids, cylinders, cones and spheres. There are several different types of prisms and pyramids, and they are named for their bases.

 Make a Tangram Square  Use all seven pieces of the Tangram to make a square with no gaps or overlaps.  Once you have completed your square, cover it up so that the people around you may continue to “enjoy” the challenge.

 Grandfather Tang’s Story make Tangram animals.  Composing and decomposing with Tangrams – share Tangram Polygon Challenge

 If students discuss kinds of sides, talk about “square angles” or corners and use color tiles to check for them. Have students make Example/Non-example sheets to check for understanding.  Eventually name shapes, use “Shape Sorting Mat” to help with this. Have students make Example/Non- example sheets to check for understanding.  If students discuss parallel sides, use dowel rods to check for them. Use parallel side sort to reinforce this concept. Have students make Example/Non- example sheets to check for understanding.

1. A square is not a rectangle. We teach primary students that there are 4 basic shapes—circles, triangles, rectangles and squares. And, in math, we have no diamond! It’s either a square or a rhombus.

 Draw a right Triangle

Common regular shapes aren't recognized for what they are unless they're upright.