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The Properties of a Parallelogram
Author:
Michael Petre
Topic:
Parallelogram
The Parallelogram. Move the vertices to understand the relationships between diagonals and angles
GeoGebra
New Resources
A note on Erdős’s mysterious remark
Golden Rectangles and Golden Spirals
以竹簽拼砌三角形
Untitled
Basic Percent Exercises (V1)
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Perpendicular Lines
graph 1
Nonagon
parabula2
Geogebra 1
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Logarithmic Functions
Multiplication
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Function Graph
Normal Distribution