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Triangle Construction – GeoGebra
ALTITUDES OF A TRIANGLE : ORTHOCENTRE – GeoGebra
Activity 12E: Choosing the Base and Height of Triangle – GeoGebra
Incircle of a triangle – GeoGebra
Centres of a Triangle and the Euler Line – GeoGebra
Was fooling around with Geogebra and found this. I didn't see
Lines of a Triangle – GeoGebra
Important Lines in a Triangle – GeoGebra
Exploring Right Triangles – GeoGebra
Internal angles of a triangle – GeoGebra
My Unique Triangle – GeoGebra
Special lines in Triangles – GeoGebra
Scalene Triangle – GeoGebra
Interactive Triangle – GeoGebra
Geogebra tutorial - drawing triangles