Geometry

Links

Addison Wesley Quiz Page
There are three interactive Geometry quizzes on theis site covering terminology, quadrilaterals, triangles, circles, volume, Pythagorean theorem and similar triangles.

E-Examples Index NCTM
This is part of the NCTM Illuminations website. It has several excellent interactive applets. Don't be fooled by the grade bands...there is more here than what they list under grades 9-12. They list only 5 applets under grades 9-12, but there are applets in other grade bands that would be appropriately used in the high school math classroom, for example, Understanding Congruence and Similarity, the Pythagorean Theorem and Perimeter, Area and Volume (all can be found in 6-8).

ENC Reform in Action
This is the Eisenhower National Clearing House Link list. It is organized by mathematics subject areas and is more user friendly than it used to be. It also has "The Digital Dozen" which are web sites that they have chosen as the best. Choose "Math Topics", then look under Geometry.

GCSE Answers' Mathematics Department Menu
Interactive quizzes on Areas of 2-d shapes, Surface Area and Volume of 3-d shapes, some right triangle Trig.

Geometry constructions with the Java Sketchpad
This is a series of 6 sketches that are interactive. Reflections, equilateral triangles, trapezoids and kites are some of the constructions. There are questions to go with the sketches that the students can explore by manipulating the diagrams.

Graphing Vector Calculator- - interactive Java APPLET
A very good demonstration of simple manipulations with vectors. The vectors can be stretched onto grid points and the resolution is shown both geometrically and algebraically. Very user friendly APPLET, but be patient as it loads.

Interactive Lessons on Transformations
Shows simple translations, reflections and rotations. Can drag image to change; uses a translation vector that can also be controlled.

Interactive Euclid's Elements
This contains all of Euclid's elements in the order that they appear historically. All can be manipulated by the viewer.

Interactive Geometry Sketches
A collection of APPLETS, most dealing with geometry. The best ones are on congruent triangles (SSS, SAS, etc) and constructions. This site is maintained by a teacher in Hong Kong, and he adds to it on a regular basis. The APPLETS sometimes take a while to load, so be prepared to wait. Good for Geometry through Precalculus.

Java Applets for the Math Classroom
This site has about five applets on geometry, with the most useful one being the line parallel to the base of a triangle. There are also applets on chords in circles and parallel lines.

Manipula Math
This is an all purpose site from Japan. The Geometry applets can be found under the Middle School section. Middle School is not the same as our Middle School. There are applets on circles, parallel lines, quadrilaterals etc.

Math Cove
JAVA applets on beginning geometry (angles and triangles) followed by a really good set of applets on transformations--translations, reflections and rotations.

Math for Morons Like Us
This is a Think Quest site (written by students) that has interactive quizzes on algebra, geometry and precalculus as well as some tutorials. The quizzes do not have drawings; they are just questions.

Math Forum
Students can find help on any topic by searching the "Ask Dr. Math" feature, teachers can search the archives for links and lesson plans, and students can participate in the Geometry Problem of the Week.

MathsNet
Choose interactive, then choose Cinderella Geometry or JavaSketchpad. This is very much like the Geometry Sketchpad. There are four choices: What shape is a...? What is meant by...? Exercises and investigations. This is a great place for students to interactively review Geometry vocabulary. There are also interactive quizzes under Interactions.

Math On Line by Jim Reed
This is a Canadian site and follows their four main teaching strands: Number, Patterns and Relations, Shape and Space and Statistics and Probability. Activities for geometry can be found in the Shape and Space strand. Mr. Reed is in the process of developing high school activities, so keep checking this site in the future!

Maths Online Numeracy Resources
Numeracy Resources is a "for pay" site, but has some free games that you can use. Two involve rotations and reflections: Transformation Golf and Post the Shapes. One involves estimating angles (Splat). There is one more on Interpreting graphs. There are other activities on the paid site that would be appropriate for middle and elementary school students.

Polyhedra Activity
Allows students to manipulate polyhedra with 4, 6, 8, 12 and 20 faces to discover the number of vertices and edges, along with the names. The applet allows the students to turn the polyhedra, slow it down, or speed it up.

Project Interactivate
This is an EXCELLENT site...all lessons include some JAVA interactive exercises, and many topics are covered, such as Transformations, Angles, Quadrialterals. Each lesson also includes a printable worksheet that can be used with the applet.

Scalars and Vectors
An expalantion of scalars and vectors followed by a short interactive quiz.

Shape and Space in Geometry
This is an interactive site on shape and space in Geometry. The space segment has students give plot maps of 3-d shapes and predict what kinds of shadows 3-d shapes will make. The shapes segments has an activity that helps students predict the length of a diagonal of a square.

Spatial Intelligence Home Page
Go to Tutorials on the Home page. This has tests of the six different kinds of spatial intelligence. The student must try to match the test figure with one of five other figures. The figures are rotated and shown from different viewpoints. When the solution is shown, the figure that matches the test figure is rotated to show that they match.

The Living Mathematics Site
The copycat game is a great interactive visual discrimination game that would be useful for geometry students who look for patterns and recognize them while rotating a cube. Look out..you can get hooked on this one.

Think Quest Library (Math)
Practice multiple choice questions on various topics. The questions are very challenging. Feedback is provided. Topics covered: Laws and Definitions, Polygons, Measurement, Trigonometry, Circles and Areas. Click on Testing Center.

Unfolding Polyhedra
This site shows the nets of various polyhedra, and then shows the net folding up into the solid. It is amazing to watch the folding and unfolding of the various nets...resembles a flower blooming in slow motion!

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