Triangles

Author:
Gerrit Stols

  • Sum of the interior angles

    Sum of the interior angles

  • Exterior angle of a triangle

    Exterior angle of a triangle

  • Equilateral triangles

    Equilateral triangles

  • Isosceles triangles

    Isosceles triangles

  • Right-angled triangle

    Right-angled triangle

  • Triangle area (different basis)

    Triangle area (different basis)

  • Pythagoras

    Pythagoras

  • Congruent: triangles

    Congruent: triangles

  • Congruent: triangles

    Congruent: triangles

  • Triangle sides: midpoints

    Triangle sides: midpoints

  • Points of intersection (Euler line)

    Points of intersection (Euler line)

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Sum of the interior angles

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