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GC World : Various Problems

Quadrangle¨Quadrangle
Five centroids of triangle etc.
Complex Number
Constant
Curves formed by lines
Graph of Function
Sets of satisfied points
MaxEMin
Alternative of real thing
Is the useless one useless?
Typical examples of GC
Famous Theorems
MovementETransformation
What will occur when something is added?
Can you make it?
What can you see?
Which is which?
Something strange?