Envelope for 14 Feb v3

Instructions

Points on the circle are labelled 1, 2, ..., N, where N is an even integer. Join the points 1 to 2, 2 to 4, 3 to 6, ..., N/2 to N, N/2+1 to 2, N/2+2 to 4, ..., N-2 to N-1. Happy Valentine's day!

新しい教材

Angle Addition: Warm Up Exercises
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Rose Curve
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
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Napoleon's theorem
Чудесатая
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Perpendicular and Angle Bisectors
Копия Събиране на рационални числа.

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幾何
対数関数
立方体
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直方体