You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England an
докажем, что через точу а проходит единственная прямая, перпендикулярная к данной плоскости.
1,2) итак, проведем в плоскости α произвольную прямую m. построим плоскость так что бы она проходила через точку а перпендикулярно к прямой m.
3,4)пусть плоскость α и
β пересекаются по прямой n. в плоскости β, через точку а проведём прямую р, перпендикулярно прямой n.
5) прямая т, перпендикулярна плоскости β, значит перпендикулярна любой прямой в этой плоскости, то есть прямая т перпендикулярна прямой р.
6) тогда прямая
p перпендикулярна двум пересекающимся прямым m и n, лежащими в плоскости α, следовательно по признаку перпендикулярности прямой и плоскости прямая p перпендикулярна плоскости α.
7) важно понимать, что такая прямая может быть только одна. если бы через точку а проходило две
прямых, например, ещё прямая p1, перпендикулярная плоскости α. но две прямые перпендикулярные одной плоскости параллельны, что противоречит нашему предположению. таким образом, через точку пространства проходит только одна прямая перпендикулярная данной плоскости.
это
утверждение в носит название теоремы о прямой, перпендикулярной к плоскости.
