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判斷球體（羽毛球）
Author:
Martin Fong
New Resources
Quadrilateral Vocabulary
Open Middle: Distance, Midpoint, Slope (1)
Grab a prize! game - fractions on a number line
Straight line y=ax+b
Pringles Chip
Discover Resources
Sumarizing data
Sangaku 15
Slope Intuition
parabola has both positive and negative roots
Slopes of Parallel & Perpendicular Lines
Discover Topics
Rectangle
Fractal Geometry
Intersection
LCM and GCD
Power Functions