Ah! That's very interesting! Although I haven't got the answer ... But I know it's sometimes a square, sometimes a parellogram and sometimes a rectangle. I think this will make us feel less boring and more challenging! Because if I already know the answer or have some new ideas, I can hide it. a F.2 student Link to the sketch

This page is really interesting, even my younger sister like it very much. (She likes to move the dots.) However, there is a problem. Did you find that in the 'Constructing the angle bisector of an angle', the circle may be too small. When the angle is greater than 90 degrees, the angle bisector could not be formed. It's the same as the one below. (My reply) But the others are wonderful. a F.3 student

I've visited the 'Javasketchpad'. It's really a cute page. Just like the software which are used in the maths lesson last year. a F.3 student

I have visited the page and I looked for the topics about F.4 maths.: angle at centre twice angle at circumference & angle in alternate segment. I have some suggestions: 1.show more information about the other angles. 2.It would be clearer and easier for observation if there were some tables marking down the results from dragging. It's better for considering the variation. a F.4 student Link to the sketch

i think the loading time is not that long for my computer... the diagrams will be useful for some problems w/ complex diagrams... a F.6 student

For the Javasketchpad pages (F.5 A.Maths & F.6 P. Maths), I think they're quite useful for me, especially the "sliding rod". I don't understand it before i really saw how it moves. It would be much better to have some explanations for each of them. a F.6 student

I am so sorry that I don't think such kind of things can help teaching. 1. For me, I have seen something like b4. Even I like maths, I am not interested in it at all. I am just interested as the picture is moving but I will not think about how and why it will move. As I am looking at it, I know that it is a fact, so I will not ask myself why and how to get those things. 2. In "angle at centre = 2*angle at circ.", the picture there just wants us to directly measure the angles and reveal the fact, I think that it is easy for students to do that even they get a book to read and try to draw by themselves. There is no need to put them in the net. 3. May be there is not enough explanation, but if there is too much, I don't think HK students will look at it! That's why the students want to be fed by teachers or tutors in tutorial centres. But if you try to type Chinese there, I think it will be more attractive. an UST Maths Major Year 3 student

Hi. I've just seen two of the javasketchpad and it's very interesting. I think it will be a good teaching tool. I have also seen some internet on-line i q games that use java applet. So I think this is not limited to geometry. a secondary school teacher

(1) dynamic (it has many parameters);

(2) interactive (teachers and students can control it);

(3) easy access (it could be posted in Internet);

(4) easy to use (teachers need not be too familiar with the software);

(5) flexible (it could be used as teachers' demonstration or students' exploration);

(6) fast (the total size is less than 1.44Mb);

(7) low cost (it is free of charge for non-commercial purpose).

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