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P為正三角形內一點,求此正三角形的邊長
Author:
Ho-Kai Chen
GeoGebra
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Visualizing the Pythagorean Identity with Sine and Cosine
Billard V5.2 and V6
apec
Tetrahedron String Art
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Circle Investigations & String Art
Construction 9
Right Triangle
Parallelogram Properties
Centroid
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Conditional Probability
Logarithm
Symmetry
Similar Triangles
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