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Problem 1 from the 1994 Nordic Contest
Author:
Alexander Bogomolny
Topic:
Angles
GeoGebra
New Resources
探究由平行線和截線所成的角
Exploring Simple Loci 探究簡單軌跡
Quiz: Finding Average Rate of Change
What is an Isogonal Conjugate?
Variation Theory Parallelogram Proofs
Discover Resources
CCGPS CA 5.1.2 Example 3
Forum_37498_A_notPossible
Two Triangle Inequalities
Представљање подскупа скупа Веновим дијаграмом
Fifteen's
Discover Topics
Conic Sections
Median Value
Secant Line or Secant
Congruence
Similar Triangles