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This is a collection of applets in the depository of GeoGebra Institute of Hong Kong ([url]https://sites.google.com/site/hkgeogebra/[/url]) which could be properly accessed using tablet devices.
1. Area of Circles
2. Exterior Angles of Polygons
3. Rolling Coin 滾動的硬幣
4. Measuring Angles Using Protractor
5. Fraction Division1: a ÷ b (Partitive)
6. Constructing Quadrilaterals by Four Sides (2014)
7. Telling time from clocks
8. Chinese Match Puzzles 2 (7 puzzles)
9. Classifying Quadrilaterals
10. Discovering Pythagoras' Theorem by Area
11. Drawing quadrilaterals on the grid or the pinboard
12. Cut Triangles into Rectangles & Dudeney's Puzzle Generalized
13. Unit Circle and Sine Graph
14. Rolling Regular Polygon 滾動的正多邊形
15. Find the Elapsed Time using 'Hours & Minutes'
16. Variety of Perimeters with Fixed Area
17. Variety of Areas with Fixed Perimeter
18. Area of Parallelograms
19. Fraction Multiplication
20. Fraction Division4: 1 ÷ a/b (Quotitive)
21. Percentages: Selling Problems, Profit & Loss
22. Circumcircle of a triangle (Soft Construction)