Quiz on Angles in a Circle 圓內的角：測驗
- Author:
- Alex CHIK
- Topic:
- Circle
If you find some bugs in this applet, please take a photo and report in http://www.facebook.com/hkgeogebra.
如程式出錯，請拍照並到 http://www.facebook.com/hkgeogebra 留言。
gMath 互動數學教室 http://www.geogebra.hk