Mathematics, 05.07.2021 04:50 JadaaJayy
Cho tam giác ABC có AB=AC. gọi là E trung điểm BC
a) chứng minh AE là phân giác góc A
b) chứng minh AE vuông góc với BC
c) vẽ EQ vuông góc với AB tại Q
vẽ EK vuông góc với AC tại K
d) chứng minh BQ=CK
e) chứng minh AQ=AK
f) chứng minh AE vuông góc QK
g) chứng minh QK// BC
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Cho tam giác ABC có AB=AC. gọi là E trung điểm BC
a) chứng minh AE là phân giác góc A
b) chứn...
b) chứn...
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