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30cm * 50cm = 1500cm²
1500cm² * 10% = 1500cm² * 1/10 = 150cm²
1500cm² + 150cm² = 1650cm²
przekątna B=5dm = 50cm
50 * 30= 1500cm
Ogon- 1500:10=150cm 150cm = jedna dziesiąta
1500cm + 150 cm = 1650 cm = 1,65
Do oklejenia latawca potrzeba 1,65m papieru .