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平行綫的斜率
Author:
Anthony OR 柯志明
拖拉紅點，令兩綫平行。 平行綫的斜率有甚麼關係？
柯志明 香港 GeoGebra 學院
Discover Resources
Smarter Balanced Pilot Test 5
Relative Unit Sizes (Length)
Correlation Coefficient Demo
Part 2. Rectangle version
Εφεξής γωνίες
New Resources
Pursuit Paths via Complex Numbers
testfileWed Oct 17 20:30:19 CEST 20180.046674271827526925
Isabelle Garand_equilateral triangle
Investigating Rotations
large angle of triangle
