hinh thang abcd co day lon cd = 36cm day nho ab = 16cm tinh chieu cao ah biet dien tich phan mo rong them de duoc hinh chu nhat DMNC la 100cm

cho hinh thang abcd day nho ab =1.2dam day lon  =125%day nho chieu cao=75%daynho Tinh dt hinh thang

cho hinh thang abcd nhu hinh ve,day lon bang 3,6cm,day nho bang 2/3 day lon,chieu cao ah=2cm

a) tinh S hinh thang abcd 

b)  tinh do dai ah,biet S hinh tam giac adh bang 25% dien tich hinh tam giac ahc

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 abcd co day lon bang 48 cm , day nho bang 3/4  day lon va gap ruoi chieu cao .tinh dien tich hinh thang

Cho hinh thang co duong cao 10 cm . Hieu hai day la 22 cm . Keo dai day nho bang day lon de thanh hinh chu nhat co chieu dai bang day lon, chieu rong bang chieu cao hinh thang . Dien tich duoc mo rong them bang 1/7 dien tich hinh thang cu.Phan mo rong ve phia ben phai co dien tich 90cm vuong .Hay tinh day lon cua hinh thang ban dau

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

cho hinh thang ABCD co day nho AB = 18cm, day lon CD = 24cm. tren duong cheo AC lay trung diem E. Noi B voi E; D voi E. Biet dien tich hinh tam giac BCE la 45cm2. Tinh dien tich hinh thang ABCD. minh dang can gap. minh cam on truoc nha.

Cho hinh thang ABCD co day nho AB la 27cm day lon CD la 48cm. Neu keo dai day nho them 5cm thi dien tich hinh thang them 40cm2. Tinh dien tich hinh thang ban dau ABCD.