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凹透鏡 Concave Lens
Author:
Alex CHIK
Drag the grey/ red points to change positions of the object. Drag the black point to change source of light.
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
Periodic Functions
Rings of circles
aperiodic monotile construction_step by step
Road Runner (beep, beep)
Is it Isosceles?
Discover Resources
TrianglesEqual Area
File for Heather's Project
Pyramids
Modul 3 (pembuktian luas segitiga) Suyanto_SMP N 1 tulang bawang udik
Ladder Problem
Discover Topics
Terms
Rotation
Circumcircle or Circumscribed Circle
Logarithmic Functions
Reflection