| Exercise 1 http://www.geogebratube.org/material/show/id/34862 Exercise 2 http://www.geogebratube.org/material/show/id/35023 Exercise 3 http://www.geogebratube.org/material/show/id/35383 Exercise 4 http://www.geogebratube.org/material/show/id/35384 Exerc |
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Posted in Math KS3, Measures, Shape and Space, MS06 Congruence & Similarity, Identify Congruent Triangles with Reasons | Add Comment »
| A coin is rolling around another fixed identical coin without slipping. If the coin starts with the head up, is the coin turned upside down when it is directly opposite to its starting position? http://www.geogebratube.org/material/show/id/33699 |
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Posted in Math KS4, Measures, Shape and Space, Others, 3 Games & Puzzles, Locus, Upside Down?, Upside Down? | Add Comment »
| Apply percentage changes to solve simple selling problems. 運用百分數變化解答簡單的買賣問題。 Eng. ver.: http://www.geogebratube.org/material/show/id/33333 中文版：http://www.geogebratube.org/material/show/id/32888 |
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Posted in Math KS3, Number and Algebra, NA05 Percentages-Selling Problems 百分數-買賣問題 | Add Comment »
| Explore the slope-intercept form of equations of straight lines. http://www.geogebratube.org/material/show/id/27527 |
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Posted in Math KS4, Measures, Shape and Space, Exploring Slope-intercept form 直線方程, Equations of Straight Lines | Add Comment »
| Explore with students the variety of the perimeters of a figure formed by several congruent squares touching side by side, and the variety of the areas of a rectangle with a fixed perimeter. http://www.geogebratube.org/material/show/id/22723 Drag each of the following numbers of squares togeth |
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Posted in Math KS2, Measures, 4M2 面積 Area, 4M2.7 Area and Perimeter | Add Comment »
| 中文版：http://www.geogebratube.org/material/show/id/32323 English version: http://www.geogebratube.org/material/show/id/31313 |
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Posted in Math KS2, Number, 4N7 擴分和約分 Expanding and Reducing Fractions | Add Comment »
| Launching Seminar of GeoGebra Institute of Hong Kong: Applying GeoGebra in the Learning and Teaching of Mathematics Date: 9 Nov 2012 (Fri) Venue: Lecture Theatre, 1/F, HKPC Building, 78 Tat Chee Avenue, Kowloon Tong, Kowloon. 2:00 pm – 2:05 pm Registratio |
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Posted in Using GeoGebra, Workshops and Seminars, 2012-11-09 Launching Seminar of GIHK | Add Comment »
| http://www.geogebratube.org/material/show/id/13674 http://www.geogebratube.org/material/show/id/13675 |
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Posted in Math KS3, Measures, Shape and Space, MS12 直角坐標遊戲 | Add Comment »
| http://www.geogebratube.org/material/show/id/13662 Worksheets can be downloaded at https://www.dropbox.com/s/flu1zuagin6k1xr/directed_num1_11-12.doc http://www.geogebratube.org/material/show/id/13663 Worksheets can be downloaded at https://www.dropbox.com/s/p4eva4bpjd1vjcs/directe |
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Posted in Math KS3, Number and Algebra, NA01 有向數加減 | Add Comment »
| Using GeoGebra 4 in Learning and Teaching of Mathematics PowerPoint: Introduction to GeoGebra Handout and Files of Hands-on Workshop (Task 1 - 10: Simple drawing tasks to produce nice figures with GeoGebra.) |
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Posted in Using GeoGebra, Workshops and Seminars, GeoGebra Workshops for Pri Math | Add Comment »
| http://www.geogebratube.org/material/show/id/20507 A GeoGebra 4.2 version of Daniel’s Mentrard same applet in GeoGebra 4 which runs much faster. Enter a function in the input box to see its solid of revolution. See other applets of Daniel Mentrard at http://dmentrard.free.fr/GEOGEBRA/index. |
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Posted in Math KS4, _M2, Solid of Revolution | Add Comment »
| 相關工作紙及教育局「網上學與教支援」資源（中文版） 中文版：http://www.geogebratube.org/material/show/id/1175 Eng ver: http://www.geogebratube.org/material/show/id/1145 |
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Posted in Math KS2, Measures, 4M2.1 以剪貼比較圖形大小 Comparing Size by Cut and Paste, 4M2 面積 Area | Add Comment »
| 利用直尺和對摺或旋轉圖形，探究各類四邊形的特性。 相關工作紙及教育局「網上學與教支援」資源（中文版） http://www.geogebratube.org/material/show/id/18992 正方形和長方形有甚麼特性？ http://www.geogebratube.org/material/show/id/18975 菱形有甚麼特性？ http://www.geogebratube.org/material/show/id/1 |
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Posted in Math KS2, Shape and Space, Math KS1, Shape and Space, 2S4 3S2 四邊形 Quadrilaterals, 2S4 3S2 常規四邊形的特性, 4S1 四邊形 Quadrilaterals, 4S1.1 常規四邊形的特性 | Add Comment »
| 相關工作紙及教育局「網上學與教支援」資源（中文版） http://www.geogebratube.org/material/show/id/19191 用顏色把四邊形 A 至 T 分類。（先點擊右邊的圖形，再點擊 A 至 T 的同類圖形。）可拖拉及施轉直尺（紅點）量度邊長及直角。 http://www.geogebratube.org/material/show/id/19190 Classify quadrilat |
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Posted in Math KS2, Shape and Space, 4S1.3 把四邊形分類 Classifying Quadrilaterals, 4S1 四邊形 Quadrilaterals | Add Comment »
| Investigate locus of orthocentre when one vertex moves on a fixed circle. http://www.geogebratube.org/material/show/id/19143 Given a circle and a chord. Construct a circle tangent to both the given circle and the chord. http://www.geogebratube.org/material/show/id/1914 |
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Posted in Others, Problems in the first workshop of GIHK, 1 Construction Problems | Add Comment »
| By Alex Chik in GeoGebraTube. Triangle Number: http://www.geogebratube.org/material/show/id/18784 Sum of the First n Odd Numbers: http://www.geogebratube.org/material/show/id/18791 |
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Posted in Math KS4, Number and Algebra, Triangle Numbers and Sum of Odd Numbers | Add Comment »
| Visualize the fraction multiples of a number and demonstrate a/b × c/d = (ac)/(bd) http://www.geogebratube.org/material/show/id/18168 In each of the following questions, drag the red and blue points on the sliders to express the required weight by the shaded area in the ap |
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Posted in Math KS2, Number, 5N3.1 Fraction Multiplication, 5N3 分數乘法 Fraction Multiplication | Add Comment »
| 香港數學教育學會和香港 GeoGebra學院聯合舉辦。 日期 ： 2012年 10月 13 日（星期六） 時間 ： 2:00 p.m. – 5:00 p.m. 地點 ： 九龍塘沙福道 19 號 教育局九龍塘教育服務中心 E418室 講者 ： 潘維凱老師（聖 |
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Posted in Using GeoGebra, Workshops and Seminars, 2012-10-13 Using GeoGebra to Solve Geometry Problems | Add Comment »
| Proof without words shared by alexchik. http://www.geogebratube.org/material/show/id/17333 Modified slightly. http://www.geogebratube.org/material/show/id/17379 |
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Posted in Math KS3, Number and Algebra, Difference of Two Squares 平方差公式 1, NA14 Identities | Add Comment »
| Factorize the randomly-given quadratic polynomials in the form of ax²+bx+c. 因式分解一元二次多項式ax²+bx+c。 For level 1, a=1; for level 2, a=1,2,3,5,7; for level 3, a=1,2,3,..,12. 程度1，a=1；程度2，a=1,2,3,5,7；程度3，a=1,2,3,..,12。 http://www.geogebratube.org/material/show/id/1 |
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Posted in Math KS3, Number and Algebra, NA11 Factorizing Quadratic Polynomials 因式分解 | Add Comment »
| http://www.geogebratube.org/material/show/id/16800 http://www.geogebratube.org/material/show/id/16801 http://www.geogebratube.org/material/show/id/16802 http://www.geogebratube.org/material/show/id/16803 http://www.geogebratube.org/material/show/id/16804 http://www.geogebratu |
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Posted in Math KS4, Measures, Shape and Space, Locus, 1. 滿足已知條件的點之軌跡 | Add Comment »
| 利用1 cm² 的正方形鋪滿不同大小的長方形和正方形，探討長方形 和正方形的面積和邊長的關係。 Explore the formula for the area of a rectangle by tessellating its space using unit squares. Chi ver: http://www.geogebratube.org/material/show/id/16657 Eng ver: http://www.ge |
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Posted in Math KS2, Measures, 4M2.6 長方形與正方形的面積 Area of Rectangles and Squares, 4M2 面積 Area | Add Comment »
| The first applet shows how a rectangle could be dissected into a square. http://www.geogebratube.org/material/show/id/14308 Explore with the second applet how this could be done. http://www.geogebratube.org/material/show/id/15775 |
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Posted in Others, Dissecting Rectangles into Squares, 2 Dissection Problems | Add Comment »
| Students may learn the formula for finding the area of a trapezium. This applet demonstrate that the simple area formula can be applied to solve this not so simple problem. http://www.geogebratube.org/material/show/id/15772 It is possible to divide the area of a trapezium into two equal halv |
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Posted in Others, Dividing a Trapezium | Add Comment »
| Steps to construct a regular pentagon inscribed inside a circle. Actually, the side of a regular decagon has been constructed first. http://www.geogebratube.org/material/show/id/15741 Move the control (red cross) from left to right to see how a regular pentagon inscribed inside a |
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Posted in Others, Construct a regular pentagon, 1 Construction Problems | Add Comment »
| The applet shows that it is possible to cut a rectangle into pieces and make a squre with these pieces. Students can think about the mathematics that make the dissection possible. http://www.geogebratube.org/material/show/id/14308 It is possible to cut a rectangle and reassemble the pieces |
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Posted in Others, Rectangle to Square, 2 Dissection Problems | Add Comment »
