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Outline

  1. Dynamic proofs
    1. Area of Trapezoid - Midsegment
    2. Area of Trapezoid - Triangles
    3. Law of Sines - Acute Angle
    4. Law of Sines - Obtuse Angle
    5. Euclid’s theorem of leg
    6. Euclid’s theorem of altitude
    7. Proof of Pythagoras' theorem (Henry Perigal)
    8. Euler's formula for polyhedra

Dynamic proofs

Author:Irena Štrausová

  • Area of Trapezoid - Midsegment

  • Area of Trapezoid - Triangles

  • Law of Sines - Acute Angle

  • Law of Sines - Obtuse Angle

  • Euclid’s theorem of leg

  • Euclid’s theorem of altitude

  • Proof of Pythagoras' theorem (Henry Perigal)

  • Euler's formula for polyhedra

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Area of Trapezoid - Midsegment

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