Quad2Go - Explorations with Quad2Go are especially appropriate for 11-12 year old students. Teaching geometry to students of this age focuses on the critical attributes of quadrilaterals and on the hierarchical relations among them. Learning means identifying critical attributes and non-critical attributes. For example, "four sides," "two pairs of parallel sides," or "two pairs of equal opposite angles" are some of the critical attributes of a parallelogram; "two long sides and two short sides" or "two acute angles and two obtuse angles" are non-critical attributes. Learning in this sense means learning to analyze the attributes of different quads, to distinguish between their critical and non-critical attributes, and learning the hierarchy among quads. Quad2Go provides many examples of randomly constructed quads. Each example can be changed by dragging either its vertices or sides.

Features

Quad2Go is a handy tool for learning about quadrilaterals by generating examples, observing, and experimenting with examples with a view toward forming generalized conjectures. Similarly to frequently used Dynamic Geometry Environments (DGE) such as the Geometric Supposer, Cabri Geometry, and the Geometer Sketchpad, Quad2Go offers geometric objects, tools to manipulate them, and measurement tools. It is limited to quadrilaterals and the construction of diagonals. Quad2Go allows users to construct, view, and transform quadrilaterals compatible with the ones constructed with straight edge and compass, to measure lengths, angles, and areas, and to manipulate the construction by dragging and transforming its shape. Dragging allows changing a shape by direct translation of parts of its components on the screen. Learning by DGE is closely related to theories of constructivist learning, in which meaning is constructed through the learner's active participation.

Suggested Activities

An exploration of hierarchy of quads

Use the Shapes menu to construct parallelograms, kites, trapezoids, and rhombi.

From the Quad2Go menu choose to view parallelograms.

Here is a construction of a parallelogram. Why?

Did you obtain a rectangle as one of the parallelograms? Do you agree that it is a rectangle? Do you think you can get a rectangle? Why?

Under which shape's choice would you expect to obtain a square? Why?

An exploration task regarding non standard classification

a square, a rhombus, and a kite are quads that share the following property: the angle between their diagonals is a right angle. Quads with this property are called orthodiagonal quads.

Discover other special properties of this class of quads.

Implementing knowledge about triangles

In any convex quadrilateral the two diagonals create eight triangles. For each type of given quadrilateral:

Identify the 8 triangles

Identify 4 congruent triangles; explain your decision.

Identify 2 congruent triangles; explain your decision.

Identify similar triangles; explain your decision.

Requirements:· Java Enabled (J2ME) Phone - Profile/MIDP-2.0 Configuration/CLDC-1.1
· Screen Resolution: 128 x 96 and above

Other Java Freeware of Developer «Math4Mobile»:

Sketch2Go Sketch2Go - encourages visual exploration of phenomena by providing qualitative indication of the ways in which the sketch drawn by the user changes. The sketch is a diagrammatic representation that attempts to help the viewer focus on the principles rather than on tedious details of the represented phenomenon. Phenomenon can refer to processes outside of mathematics (e

Graph2Go Graph2Go - Graphing calculators are instrumental in teaching and learning mathematics. It is an environment that supports conceptual understanding of functions in general, and school algebra and real analysis in particular. Especially, it enhances connections between graphic and symbolic representations

Fit2Go Fit2Go supports exploration and modeling activities. It supports data collection by proposing a model that can appropriately describe the user's data. The tool highlights the numeric aspects of a phenomenon. Together, Sketch2Go and Fit2Go provide a comprehensive view of models and modeling

Solve2Go Solve2Go - supports solving equations and inequalities by means of conjectures based on visual thinking. Conjectures can be refuted or supported by examples provided by the tool, and should be proved using symbolic manipulations on paper.
Equations: when we want to know for which values of x the two functions are equal

Sketch2Go Sketch2Go - encourages visual exploration of phenomena by providing qualitative indication of the ways in which the sketch drawn by the user changes. The sketch is a diagrammatic representation that attempts to help the viewer focus on the principles rather than on tedious details of the represented phenomenon. Phenomenon can refer to processes outside of mathematics (e

Trigonometry Trigonometry - Trigonometry is a branch of mathematics which deals with triangles, particularly triangles in a plane where one angle of the triangle is 90 degrees (right angled triangles), and a variety of other topological relations such as spheres, in other branches, such as spherical trigonometry

MobileMath MobileMath - MobileMath turns your mobile into a calculator supporting many operations such as: evaluate expression, plotting, differentiate & integrate expression...
Supports basic functions of a calculator:
· Operators : +, -, *, /, ^
· Functions : sin, cos, tan, exp, ln...
· Solve equations
· And much more..

HexNumber This is a number converter. You can enter a decimal, hexdecimal, binary or octal number and see what it is in the other formats. The full version has a very much better interface plus you can convert to and from any base, it's available only for 0.5$

Mobile Maths v1.7 1. Professional Calculator 2. Equation Solver 3. Definite Integration 4. Function Solver 5. Linear System Solver 6. Powerful Graph 2D 7. Powerful Graph 3D 8. Powerful Curve Fitting (Regression) 9. Statistics 10. Matrix Operations 11. Interpolation using Cubic Spline 12. Unit Conversion 13. Powerful Periodic Table 14. Powerful Molecular weight calculations 15. Opening files from phone/card memor

Quadratic equation solver free This free application solves a quadratic equation and returns the roots(even imaginary roots)

operation matrix Always had trouble with those difficult matrices sums?
here's help-operation matrix!
that performs matrix operations for you

SimulME SimulME is a mobile application with Queueing calculator, Stopwatch, Monte Carlo simulation, Random Number Generator (RNG), Probability distributions, Kolmogorov-Smirnov and Chi-square tests

Graph (Java) Graph calculates mathematical expressions and draws function graphs on the screen of J2ME mobile devices

Function Grapher Function Grapher - Math function graphing tool: renders the graph based on your input equation. examples: 2x^2, sin(x) instructions: Press 'select' button to enter a equation then press 'Graph'(left soft key) to render the graph in screen version: 1.0

Comments on Quad2Go:

Comments not found

JavaMobiles - Free Java games download for mobile phones. Java Applications, Software, JAR, Apps for Nokia, Samsung, touch screen, 240x320 screen