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สามเหลี่ยมพีทาโกรัส
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รัชนีกร กาประโคน
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G_10.04 Parallel and perpendicular lines_1a
A2_1.04 Solving quadratic equations with complex solutions
Music Box with Rotating Ballerina
دوران 90 درجه نقطه
Demo: Applet communication using JavaScript
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Lens Refraction and Spherical Aberration
Inscribed Parabola
Allison Brooks
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Multiplication
Mathematics
Conic Sections
Polygons
Calculus