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      J315 Magnetic Geometric Puzzle
      It is a magnet in a square of the magnetic chassis, using different film together, be able to spell basic graphics, graphic anomalies, the combination of graphics than 200 dollars, can use up cutting, folding, pan, flip, and other methods And flexible graphics for change and the fight out of the graphics area and perimeter, derived triangle, parallelogram, trapezoid, and other graphics of the formula for calculating the area; help students to develop the concept of points, to understand the meaning and nature of the score, but also demonstrate And so on the plot, such as at the end of the triangle and parallelogram high ratio of the number of a class of abstract relations.



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