Isometric transformation – Rotation

 dans Euclide Geometry Principles par Harvey Littleman

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Rotation of triangle ABC from point O with angle α

• AB=A’B’, BC=B’C’, AC=A’C’
• ∠ABC= ∠A’B’C’, ∠BAC=∠B’A’C’, ∠ACB= ∠A’C’B’
• ∠(AB,A’B’)=∠(AC,A’C’)=∠(BC,B’C’)=α

 

 

See also « Isometric transformation« 

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