Cho tam giác ABC vuông tại A có AB=3cm; AC=4cm AM là đường trung tuyến. Trên tia đối MA vẽ điểm D sao cho MA=MD a) Tính BC? b) Chứng minh tam giác ABM=tam giác ACM c) Chứng minh góc BAM lớn hơn góc CAM

Các câu hỏi liên quan

I. Use the cues given to write correct sentences. 1. Many countries/ already using/ solar energy. .................................................................................................................................... 2. save/ energy/ one/ best/ way/ conserve/ natural/ resources. .................................................................................................................................... 3. At present/ most/ our electricity/ come/ use/ coal, gas, oil or nuclear power. .................................................................................................................................... 4. plant/ tree/ create/ shade/ around/ house/ help/ keep/ cool. .................................................................................................................................... 5. This power/ could/ provide/ sun. .................................................................................................................................... 6. not leave/ fridge/ open/ cold air/ escape/ use/ lot/ electricity. .................................................................................................................................... 7. One percent/ solar energy/ reach/ earth/ enough/ provide power/ the total population. .................................................................................................................................... 8. Turn/all/light/every/time/leave/room. ....................................................................................................................................