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Outline
Triangles
Sum of the interior angles
Exterior angle of a triangle
Equilateral triangles
Isosceles triangles
Right-angled triangle
Triangle area (different basis)
Pythagoras
Congruent: triangles
Congruent: triangles
Triangle sides: midpoints
Points of intersection (Euler line)
Triangles
Author:
Gerrit Stols
Sum of the interior angles
Exterior angle of a triangle
Equilateral triangles
Isosceles triangles
Right-angled triangle
Triangle area (different basis)
Pythagoras
Congruent: triangles
Congruent: triangles
Triangle sides: midpoints
Points of intersection (Euler line)
Next
Sum of the interior angles
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