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PetersenJ
Author:
jpetersen099
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Involute of the Circle
立体几何-公理3及推论
分數化百分數：練習
Tangent in Cartesian and Polar Coordinates
bewijs stelling van Pythagoras
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Quadratic Quiz
The Pythagorean Theorem - Moving Point B
Part 2
การบวกจำนวนเต็ม
Vilka fyra figurer gömmer sig här?
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Rhombus
Angles
Root
Interest Calculation
Ellipse