Google Classroom

GeoGebra Classroom

凹透鏡 Concave Lens

Egilea:Alex CHIK

Drag the grey/ red points to change positions of the object. Drag the black point to change source of light.

GeoGebra 互動數學教室 http://www.geogebra.hk

Baliabide berriak

Aurkitu Baliabideak

Aurkitu Gaiak