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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
Slope of a Straight Line: Run and Rise
Construct a Square
"Compressed" Astroid as Envelope
Play C3 E3 G3 C4_C4
Napoleon's Theorem
Discover Resources
Factoring Trinomials Level 1
The Tangent Function
Volume of a cylinder
Week 3 Assessment p. 480 #4
floorplan
Discover Topics
Random Variables
Bar Chart or Bar Graph
Standard Deviation
Geometric Distribution
Linear Equations