Cho tam giác ABC , có AM là trung tuyến ứng với BC . Trên cạnh AB lấy điêm D và E sao cho AD=DE=EB . Đoạn CD cắt AM tại I . Chứng minh : a, EM song song với DC b, I là trung điểm của AM c, DC = 4DI

Which statement is true? the given sides and angles cannot be used to show similarity by either the sss or sas similarity theorems. the given sides and angles can be used to show similarity by the sss similarity theorem only. the given sides and angles can be used to show similarity by the sas similarity theorem only. the given sides and angles can be used to show similarity by both the sss and sas similarity theorems.

Divide. write in simplest form 41/6 divided by 10

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25