cho hinh thang abcd day be ab day lon cd hai duong cheo ac va bd cat nhau tai dien o tim va giai thich cac cap tam giac co dien tich bang nhau
cho hinh thang abcd day be ab day lon cd hai duong cheo ac va bd cat nhau tai o tim va giai thich cac cap tam giac co dien tich bang nhau
cho hinh thang abcd day be ab, day lon cd,2 duong cheo ac va bd cat nhau tai o . tim va giai thich cac cap tam giac co dien tich bang nhau
giup minh voi !
Cho hinh thang ABCD day be AB, day lon CD, hai duong cheo AC va BD cat nhau tai O.Tim va giai thich cac cap tam giac co dien tich bang nhau?
giup mk voi
cho hinh thang ABCD day be AB,day lon CD,hai duong cheo AC va BD cat nhau tai O.Tim va giai tich cac cap tam giac co dien tich bang nhau.
cho hinh thang ABCD day be AB day lon CD,hai duong cheo AC va BD cat nhau tai O.Tim va giai thich cac cap tam giac co dien tich bang nhau
Cho hinh thang ABCD co day be bang 2/5 day lon cd . Biet dien tich hinh thang bang 140 cm2 .
a} Tinh dien tich cac tam giac ABD , ABC.
b} So sanh dien tich tam giac ABO , AOC {Hai duong cheo AC va BD cat nhau tai O }
giai nhanh me cho ***** nha !thanhs!
BAI1
Cho tam giac deu ABC .Diem M nam trong tam giac do.Qua M ke duong thang song song voi AC va cat BC o D,ke duong thang song song voi AB va cat AC o D,ke duong thang song song voi BC va cat AB o F.CMR
a,BFMD,CDME,AEMF LA CAC HINH THANG CAN
b,goc DME=goc EMF=goc DMF
c,Trong ba doan thang MA,MB,MC doan lon nhat nho hon tong hai doan kia
BAI2
Hinh thang can ABCD (AB//CD)co hai duong cheo cat nhau tai P,hai canh ben keo dai cat nhau tai Q .CMR
PQ la duong trung truc cua hai day
hinh thang abcd co day à dai gap3 lan day bc hai duong cheo ac va bd cat nhau o diem i
a tim cac cap tam giac tao thanh trong hinh thang co dien tich bang nhau [yeu cau giai thich]?
b tinh dien tich tam giac abi , biet dien tich hinh thang la 48cm2
