Cosine rule & Pythagoras' Theorem

Argomento:Coseno, Pitagora o teorema di Pitagora

Drag the RED point to create an non-right angle triangle. How does the COSINE rule extend Pythagoras' theorem to describe non-right angle triangles? (Tick the box to see the Working).

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bewijs stelling van Pythagoras
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Balanced Tetradecahedron
Gradient of tangent 2
y=(x+a)^3+(x+a)^2
ympyran_tangentti2
Linear Graphs JHa

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