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Nine point circle
Author:
Kaileung Chan
Topic:
Circle
GeoGebra
New Resources
Opposite, Adjacent, Hypotenuse in a Right Triangle
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A note on Erdős’s mysterious remark
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Slopes of Parallel Lines
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Activity B
Happy Holi
Prisma
Sine & Cosine of a Sum: Discovery
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Square
Equilateral Triangles
Rotation
Linear Equations
Hypergeometric Distribution