- Geometria
- Angoli supplementari
- Age 11-13
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level: 1.1 Sc. Sec. Primo grado
- Italian
คำแนะนำของผู้เขียน
spiegazione ed esercizi, con sintesi vocale
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Angoli supplementari bis
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คำแนะนำของผู้เขียน
spiegazione ed esercizi, con sintesi vocale