Once a geometrical diagram has been drawn, it is often required to prove a concept by showing that two lines are indeed parallel or perpendicular. When creating abstractions, Kig uses other lines and points already on the diagram to lock onto, making it easy to achieve high precision. Kig allows users to create complex geometrical abstractions from over thirty simple tools, such as points, parallel and perpendicular lines, arcs, bisectors, circles, and hyperbola ( Figure 6-19). It is an extremely powerful package but very simple to use. Kigįor people wishing to learn about geometrical construction in mathematics, Kig is a must. KHangman comes with three built-in word lists, but these can be extended easily. KHangman shows a blank base to start as the user chooses letters, they are entered into the word if correct or placed on the tries list if incorrect, in which case the hangman begins to grow. This modern version of a classic game helps children learn to spell and recognize letter patterns in words. Factorization is a key skill in using and manipulating fractions.
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