D
dachot


Cho hinh thang BCD (AB//CD) co AB < DC. Chung minh rang :
A, AD + BC > DC – AB
B, DC – AB > | AD – BC |
Cho hinh thang BCD (AB//CD) co AB < DC. Chung minh rang :
A, AD + BC > DC – AB
B, DC – AB > | AD – BC |
A, AD + BC > DC – AB
B, DC – AB > | AD – BC |
Cho hinh thang BCD (AB//CD) co AB < DC. Chung minh rang :
A, AD + BC > DC – AB
B, DC – AB > | AD – BC |
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