A wooden frame has screws at A, B, C, and D so that the sides of it can be pressed to change the angles occurring at each vertex. AB = CD and AB || CD, even when the angles change. Why is the frame always a
parallelogram?

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Ответ:

gabbiej

27.08.2022

Mathematics

1472 minutes

24 hours and 32 minutes

1 day and 32 minutes

1 day, half an hour, and 2 minutes

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A wooden frame has screws at A, B, C, and D so that the sides of it can be pressed to change the angles occurring at each vertex. AB = CD and AB || CD, even when the angles change. Why is the frame always a parallelogram?