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與兩平行線保持相等距離的點的軌跡
Author:
Anthony OR 柯志明
New Resources
G_7.02 Similarity transformations
G_10.04 Parallel and perpendicular lines_1a
A2_1.04 Solving quadratic equations with complex solutions
تقارن مرکزی
Othographic Views of a Solid
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rhythmExample
Pepe the frog
perpendicular bisector
step3.10Fig3
Steiner chain inversion
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Ellipse
Optimization Problems
Sphere
Upper and Lower Sum or Riemann Sum
Trigonometric Functions