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Euclid I.5 part 2
Author:
Courtney Roby
Show that in isosceles triangles, a) the angles at the base are equal to one another, and b) the angles under the base are equal to one another.
GeoGebra
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apec
從邊長辨認四邊形
Untitled
拼砌四邊形 - 工作紙
Pythagorean Day
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Elizabeth's GeoGebra Book
January 18th
Elizabeth's Triskele
perpendicular bisector - circumcenter
Similar Right Triangles
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Incircle or Inscribed Circle
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Linear Functions
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