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Author:
TEngavoll
Endre vinkel Theta for å måle bølgelengde på fotonene. En film med forklaring ligger på:
http://youtu.be/NuObtZYiuG8
GeoGebra
New Resources
Rose Curve - A Classical Construction
Supplementary Angles
van Aubel's Theorem
Rotating Points (Optical Illusion)
Parallel or Not? (V2)
Discover Resources
quadrilaterals
Start, Perpendicular Bisector
day 116
การลบจำนวนเต็ม
Proof Without Words