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Constructing the centre of an ellipse inscribed in a quadrilateral

Author:MA2219

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Shells
Reflection = 180° Rotation about a Line
Locus Related to Descartes' Folium
Volume by Shells Around y
Making New Year's resolutions for 2026

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true/circles-are-parallel-ex90.ggb
Finding θ
Theorem 6-14
Reflections on the wall
Triangle for Tangent Ratio

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Prism
Hyperbola
Pie Chart or Circle Chart
Sequences and Series
Mathematics

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