MSTE
Office for Mathematics, Science, and Technology Education
College of Education @ University of Illinois

# MSTE Online Resource Catalog

Geometry

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### Interactive

Unit Circle Applet Estimation of Pi Sum of Angles Folding a Cylinder Title Brief Description Category Date Find Sin, Cos, Tan, Cosec, Sec, and Cotan for any angle on the unit circle. Geometry 6/18/2014 Shoot random points at a circle to approximate the value of Pi. Geometry 6/16/2014 Draw a polygon and then count the sum of its angles. Geometry 6/4/2014 Applet that demonstrates foldings a piece of paper into a cylinder. Geometry 4/3/2009 A collection of Java Sketches created in Geometer's Sketchpad and saved as Java Applets Geometry 2/26/2007 Graph points in the plane Geometry 11/1/2005 Fold this piece of paper into a three dimensional pyramid. Geometry 7/29/2004 Graph a wide range of functions in 3 dimensions. (requires Java3D download) Geometry 6/17/2004 Create shapes with a virtual Geoboard. Geometry 9/21/2003 Explore the Pythagorean Theorem through regular polygons and circles on the sides of a right triangle. Geometry 9/18/2003 Learn about inscribing a regular polygon in a circle. Geometry 2/26/2002 Learn about the relationship between a polygon's inner angle and its number of sides. Geometry 11/29/2001 Produce up to 500 non-trivial Pythagorean Triples. Geometry 10/22/2001 Fold this piece of paper into a three dimensional box. Geometry 8/3/2001 Illustrates the effect of a given matrix on the unit circle. Geometry 3/5/2001 Approximate the surface area for the Earth if its radius changed. Geometry 8/20/2000 Fill a rectangular box with cubes. Geometry 4/20/2000 Approximate the area of a circle using a grid. Geometry 4/1/2000 Play with the perimeter of boxes. Geometry 3/27/2000 Explore triangles using Java Sketchpad Geometry 1/17/2000 View Autocad files made by TCD students. Geometry 12/7/1999 Dazzle your students with this so-cool animated introductory exercise Geometry 10/22/1996 A Java-based, online version of the Elements Geometry 4/7/1996

### Lessons

Title Brief Description Category Date
A lesson to accompany the "Folding a Rectangular Prism" applet Geometry
1/1/2006
Roll dice and see the relationship between sides of a triangle. Geometry
7/3/2001
This tool seems very effective for teaching Geometry at remotely located students. Geometry
5/30/2001
Geometrically show the differences between 2 squares. a*a -b*b=(a-b)(a-b)*(a+b)(a+b) Geometry
2/10/2001
An Introductory Project in Trigonometry using The Geometer's Sketchpad Geometry
2/9/2000
This lesson deals with proportions, right triangles and the geometric mean Geometry
3/22/1999
2/3/1999
This activity includes an Excel file and a Java fileto experiment with interactive triangles. Geometry
12/30/1998
This lesson/unit allows an exploration into the ratio that designates a cancerous cell. Geometry
Geometry
12/22/1998
Unit designed to teach surface area and volume Geometry
10/21/1997
A lesson that uses many options for studying tesselations Geometry
10/21/1997
A Fractals Lesson for Elementary and Middle School Students Geometry
7/9/1996
Find the temperature at a particularpoint of a rectangular plate using statistical methods. Geometry
6/30/1996
1/19/1996
Enjoyable activities involving geometric transformations and image distortion. Geometry
10/29/1995
Illustrates the intuitive notion of the tangent plane to a graph of a function of two variables. Geometry
10/22/1995
Supplementary material to help students with their first encounter with vectors. Geometry
10/22/1995