... uuur uuur r, M là trung i m của DE. Chứng minh rằng:1 13 8AM AB AC= +uuuur uuur uuur____________________________________________________________________________B i gi i _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ... HƯNG ĐẠOĐỀ KIỂM TRA 45 PHÚT TOÁN 10 HÌNH HỌC GIỮA CHƯƠNG I ____________________________________________________________________________ĐỀ 1Câu 1 Cho 5 i m A,B,C,D,E. Chứng minh rằng:)b ... lần lượt nằm trên các cạnh AB, AC sao cho 2 3 0, 3 0IA IB JC JA+ = + =uur uur r uuur uur r, K là trung i m của IJ .Chứng minh rằng:3 3 10 8AK AB AC= +uuur uuur uuur____________________________________________________________________________Bài...