ПОМОГИТЕ С ГЕОМЕТРИЕЙ,ПОЖАЛУЙСТА!
1.AB не пересекает α;AC=CB;AA1∥СС1∥BB1; AA1=5; BB1=7. Найти:CC1
2.ABCD-параллеограмм,AA1∥BB1∥CC1∥DD1
AA1=2, BB1=3, CC1=8. Найти:DD1.
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