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

### Lessons

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