### Worksheets for Informal Geometry

Our worksheets can be obtained in Postscript (PS) or Portable
Document File (PDF).

###

Geometer's Sketchpad

One of the best introductions to GSP I know of is the one by Mike
Riedy. All the labs below are just sligthly altered versions of his.
You should take a look at the
original.

an **Intro to Geometer's
Sketchpad** (PS)
(PDF) (A version I use in a Math. Ed.
course)

Another **Intro to GSP** (PS)
(PDF) (This version was used in a
fresmen seminar)

**Creating Tessellations** using translations, rotations and
reflections (PS)
(PDF)

###

Tesselations:

**An introduction to tessellations
**(PS)
(PDF)

**More on tesselations **(PS)
(PDF)

**Tessellation Techniques** for some special cases.
(PS)
(PDF) Using the "Totally
Tessellated" website explore some methods for creating tessellations.

**Pentominos**
(PS) (PDF)

**Polynominos**
(PS)
(PDF) A more generalized worksheet
exploring triominoes, tetrominoes and pentominoes.

**Tetrominoes en Polynominoes**
(PS)
(PDF) Explore tetrominoes and
polynominoes. Create tessellations using some of these shapes

**Regular and semi-regular
tessellations** (PDF)
Explore regular tessellations (there are 3) and semi-regular
tessellations (there are 8). (Refers to pages in O'Daffer and
Clemens.)

I also have a slightly **shorter version**
(PS)
(PDF) (less detail, more of an
intro to regular and semiregular tessellations. I combined this lab
with a lecture in which I proved that there are only three regular
tessellations.)

**Tesselating a hexagon **(PS)
(PDF) How many ways can we tessellate a
hexagon? You should use pattern blocks for this exercise.

**Polygons and Symmetry
**(PS)
(PDF) Explore the
website "Totally tessellated and learn about polygons and symmetry.

**Regular Polygons and Tessellations
**(PS)
(PDF) Explore the
website "Totally tessellated and learn about regular polygons and
tessellations.

###

Other Topics

**Diagonals
**(PS)
(PDF)

**Triangles**
(PS)
(PDF)

**Triangles and Quadrilaterals**
(PS)
(PDF)

given certain triangles, what type of quadrilaterals can we form with
them.

**Area** (PS)
(PDF)

**Finding the center of a circle (a GSP exercise)**
(PS)
(PDF)

**Counting Squares** (PS)
(PDF) How many squares toatl can you
find in a square, divided in nxn squares

**Pricing a patio** (PS)
(PDF)

One of our faculty has compiled a useful list of links which can
be viewed
here