Các câu hỏi tương tự
Cho hinh thang ABCD co AB // CD, goc C < goc D.
CMR AC > BD.
Giup mk voi!!!!
cho hinh thang ABCD AB//CD co goc D =60 do,AB=AD
a,Tinh cac goc cua hinh thang
b,chung minh BD la tia phan giac cua goc ADC va tinh goc DBC
ve hinh luon nhe
cho hinh thang abcd (ab//cd) co bc = bd . goi h la trung diem cua cd. duong thang qua h va cat ac va ad lan luot tai e va f . cm goc dbf bang goc ebc
Cho hinh thang ABCD(AB song song DC) co BD la phan giac goc D va BD vuong goc vs BC.Biet AB bang 6, goc D la 60 do.Tinh DC, canh ben,duong cao va duong cheo hinh thang ABCD
Cho hinh thang can ABCD co day nho la ab duong cao BH bang duong trung binh. CMR: BD vuong goc voi AC
BAI 1 : cho hinh thang ABCD khong co goc vuong biet tong do dai 2 canh day AB va CD thi bang do dai canh ben AD cmr cac duong phan gaic trong goc A vs goc D di qua trung diem E cua BC
Bai 2 : cho hinh thang ABCD co AB//CD cmr neu CD = AD + BC thi cac duong phan giac cua cac goc A va B cat nhau tai 1 diem thuoc canh day CD
Lam giup mink vs mink dang gap lam . THANKS
cho HCN ABCD co goc BDC=30.qua C ke dg vuong goc voi BD, cat BD o Eva cat tia p/giac cua goc ADB o M
a, CMR AMBD la hinh thang can
b,goi N la hinh chieu cua M tren DA, K la hinh chieu cua M tren AB
CMR N,K,E thang hang
cho hinh thang ABCD co AB//CD, goc C+goc D=90,CD>AB.Goi E,F,M,N lan luot la trung diem cua AB,CD,Ac,DB.CMR
a,tg EFMN la hinh chu nhat
b. EF=(CD-AB)/2
c, DA cat CB tai K. CM K,E,F thang hang
d,cho KD=8cm, BC=10cm. tinh dien thich tg ABCD va EMFN
Hinh thang ABCD co AB//CD,goc A bang 3 lan goc D,goc B tru goc C bang 30 khi do goc A cong goc B bang?