Rectangles (Scaffolded Investigation)

主題：矩形

The applet below contains a quadrilateral that ALWAYS remains a rectangle. Interact with this applet for a few minutes. As you do, be sure to move points A, B, and D around!

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Curved Surface Area of Cones (Parametric Curved Surface)
Plotting points-1
Integral and area of semi-circle transfomrations
Assenstelsel voorbeeld
Pattern exploration: Equidistant Points on a Circumf v2

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二維向量
正切線或正切
立方（體）
不等邊三角形
算術

Rectangles (Scaffolded Investigation)

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