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從1~20,選出7個不同的自然數,令到下列分數之和為1。
Author:
Patrick Chung
GeoGebra
New Resources
Stairs (Optical Illusion)
History of Maths - Work in progress
Piano. Keyboard.
Isosceles Triangle: Quick Construction
"Compressed" Astroid as Envelope
Discover Resources
Reflecting Telescope
A Demonstration of 3-Dimentional Pythagorean Theorem in Action!
Однос међу угловима паралелограма
Squaring the circle.
Bài tập 6a trang 114
Discover Topics
Inequalities
Differential Calculus
Incircle or Inscribed Circle
Difference and Slope
Orthocenter