搜尋標籤: "reflectionalsymmetry"
More about 3-Dimensional figures (English subtitles available)The nature of reflectional and rotational symmetry in plane figures is reviewed at the start of the programme and is then followed by the introduction of symmetry in 3-D solids. When a solid is…
ronson@hkecl.net
0 個讚
999 次播放
|