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.
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.
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»:
Graph2Go Graph2Go is a special-purpose graphing calculator that operates for given sets of function expressions
Fit2Go Fit2Go is a linear and quadratic function graphing tool and curve fitter
Solve2Go Solve2Go supports solving equations and inequalities conjectures based on visual thinking
Sketch2Go Sketch2Go is a qualitative graphing tool. Graphs are sketched using seven icons representing constant, increasing, and decreasing functions that change at constant, increasing, or decreasing rates
TVH-72g Graphing Calculator Graphing calculator for the educational use of schools and students who may have difficulty, are unable or may not wish to acquire a stand-alone feature-laden graphing calculator
Maths Training Math Training is a fun way to practice your basic arithmetic. Choose from four signs of math!
operation matrix Always had trouble with those difficult matrices sums?
here's help-operation matrix! that performs matrix operations for you
Aritm by MOB Aritm trains you in simple mental calculation. This program teaches its users the addition, subtraction, multiplication, and division tables. It employs a very effective method, which makes the process short with these useful tables
BrainBooster Train your brain with this simple maths and time it to beat your own record
MobileMath MobileMath turns your mobile into a calculator supporting many operations such as: evaluate expression, plotting, differentiate & integrate expression
Asal Sayilar Little app to check whether a number is a prime number, to count the number of prime numbers between two numbers, to benchmark your device
MultDivTrainer This application gives you multiplication and division mathematical problems in order to train your brain. Set your level of training, and start using the program. The software keeps record of your efficiency/speed
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