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Author:
Barbara Lichtenegger
New Resources
Stairs (Optical Illusion)
Angles and Intersecting Lines: Quick Investigation
Slope Field (1)
Isosceles Triangle: Quick Construction
Supplementary Angles
Discover Resources
Poincare Disc 1
Plane demo - (r-a) is a vector in the plane
Ptolemy's Theorem
Doppelreifen
CLASSIFICATION OF TRIANGLES ON THE BASIS OF THEIR ANGLES
Discover Topics
Numbers
Angles
Quadrilaterals
Tangent Line or Tangent
Similarity Transformation or Similarity