Cho hinh thang can ABCD co day nho CD=4cm; A+B=1/2(C+D), AC vuong goc BC. Chu vi hinh thang can abcd

Cho hinh thang can ABCD co day nho CD=4cm; A+B=1/2(C+D), AC vuong goc BC. Chu vi hinh thang can abcd

Cho hinh thang can ABCD co AB//CD , BD la phan giac goc D va DB vuong goc voi BC . Biet AB =4 .Tinh chu vi hinh thang

Cho hinh thang can ABCD (AB//CD) co DB la tia phan giac cua goc D ;DB vuong goc BC biet AB =4cm .Tinh chu vi hinh thang

cho hinh thang can abc day nho ab = bc dg cheo ac vuong goc ad

a) tinh cac goc hinh thang can

b) cm cd = 2ab

Giup minh vs

Cho hinh thang can ABCD. Day nho AB bang canh ben BC va duong cheo AC vuong goc oi canh ben AD.

a) Tinh cac goc cua hinh thang can

b)Chung minh rangg trong hnh thang can do day lon gap doi day nho

Bai 1: Cho tam giac ABC vuong can tai A. Ve phia ngoai tam giac ABC, ve tam giac BCD vuong can tai B. Tu giac ABCD la hinh gi ? Vi sao?

Bai 2: Hinh thang vuong ABCD co goc A= goc D=90 do, AB=AD=2cm, DC= 4cm. Tinh cac goc cua hinh thang

Giup minh vs! Excuse me! Thank you rat nhieu !^^

cho hinh thang can abcd co duong cheo bd vuong goc voi canh ben bc, bd la tia phan giac cua goc d.tinh chu vi cua hinh thang biet bc=a

cho hinh thang can abcd co duong cheo bd vuong goc voi canh ben bc, bd la tia phan giac cua goc d.tinh chu vi cua hinh thang , biet bc=a