Invariance of a triangle's area

Topic:Area

The applet illustrates the conservation of the area of the triangle ABC1 (or ABC2) while dragging points C1 (or C2) on the line k (k parallel to l). In addition, invariance of the property S1 = S2.

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函數的單調性
Visualizing the Pythagorean Identity with Sine and Cosine
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random coprime pairs
Untitled

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Function diagrams
rhombus
Animation of Angle Sum of Triangle'in kopyası
bits-demo
Differentiating Quadratics (and other polynomials)

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Polynomial Functions
Symmetry
Differential Equation
Orthocenter
Line Segment