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Mathematics, 09.08.2021 14:20 qwertytown99
Cho tam giác ABC. Trên tia đói của tia AB ta lấy điểm E sao cho AE=1/2 AB và trên tia đối của tia AC ta lấy điểm D sao cho AD=1/2AC.
a/ Chứng minh ED//BC
b/ Chứng minh DE=1/2 BC
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Answers: 2
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Cho tam giác ABC. Trên tia đói của tia AB ta lấy điểm E sao cho AE=1/2 AB và trên tia đối của tia AC...
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