CHO HÌNH BÌNH HÀNH ABCD CÓ 2 ĐƯỜNG CHÉO CẮT NHAU TẠI O

HE THONG DE KIEM TRA TRAC NGHIEM 15 HINH HOC 10 CBDOC

 

^^^^^^^^^^^^^^^{AB DC}^^^^^^^^^^^^^^^

^{AD BC}^

OA OC OB OD      ⁰

^AC ^^BD  

^{AD AB}^ ^^AC