I CƯƠNG VỀ ĐƯỜNG THẲNG VÀ MẶT PHẲNG pot

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E h DUC NG THANG V A A MAT |

ONG VE DUO

( tiép theo )

GV : VU THU MINH NGUYET

Pie

ee

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eR RR RR RRR RR RRR RRR RRR RRR RRR a oN

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Vy ýyývyvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvxw‹e

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VT 532HM

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a

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om

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ag a a ta Na RG NNN tt NNN NN aay

vẻ

RASA RS SIROTA SSRIS SST ER SOI SEA SOS SIR OOO ON NAAM AA ANAM

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Vi du

Cho hình tứ diện ABCD, E, F, H lân lượt là các điểm bất kỳ trên AB, AC, BD

a Tim giao tuyến của ( HEFE ) với ( ABC )

b Tìm giao điểm I của BC và ( HEF )

C Chứng minh rằng 3 điểm I, E ,F thắng hàng

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