Các câu hỏi tương tự
Mot thua ruong hinh thang co day be AB=20m day lon CD=40m va chieu cao AD=32m. Nay vi mo rong duong nen bi cat mat mot hinh thangco day lom la CD va chieu cao 8m .Tinh dien tich con lai
1 thua ruong hinh thang co day lon 63 m , day be 5/7 day lon va bang 9/ 8 chieu cao . Nay do mo rong duong phai cat day lon di mot so met , vi vay thua ruong con lai van la hinh thang co dien tich la 1910 m vuong .hoi da cat day lon di bao nhieu met ?
mot thua ruong hinh thang co day lon hon day be 8m co chieu cao la 32m nay nguoi ta dap mot con duong chay qua thua ruong phan con lai la hinh thang vuong co dien tich kem dien tich ban dau la 96m2 de phan con lai tro thanh mot thua ruong hinh chu nhat ma dien tich bang dien tich ban dau thi ta phai thay doi hai day cua hinh thang nhu the nao
mot thua ruong hinh thang co chieu cao la 10m hieu cua 2 canh day la 22m.Nguoi ta mo rong thua ruong do thanh hinh chu nhat co chieu daibang canh day lon va chieu rong bang chieu cao .Dien tich duoc mo rong bang 1phan7 dien tich cu .phan dat mo mo rong them ve phia tay phai la 90m vuong .Tinh day lon cua thua ruong cu
Mot thua ruong hinh thang vuong co day be bang chieu cao va bang mot nua day lon .Thua ruong do duoc mo rong thanh hinh chu nhat. Tinh dien tich hinh thang biet dien dien tich phan mo rong la 5dam2.
thua ruong hinh tam giac vuong ABC vuong goc tai A AB dai 40m canh AC dai 60m nay nguoi ta cat ra 1 manh hinh thang vuong AMNC co day lon la canh AC cua thua ruong va chieu cao 10m de gieo ma tinh dien tich con lai
1/Mot vuon hoa hinh hop chu nhat co chu vi la 128m,chieu rong bang 3phan5 chieu dai .Tinh dien tich hinh chu nhat .2/Mot manh vuon hinh chu nhat co chu vi 228m, chieu rong 40m .o giua manh vuon , nguoi ta dao 1 cai ao hinh vuong canh 10m .Tinh dien tich phan dat con lai .3/Mot thua ruong hinh thang co day lon la 69m,day be 2phan3 day lon va chieu cao bang 3 phan 4 tong do dai hai day.a/Tinh dien tich thua ruong dob/Trung binh 100m vuong thua ruong thu hoach duoc 70 kg thoc. Hoi ca thua ruong th...
Đọc tiếp
1/Mot vuon hoa hinh hop chu nhat co chu vi la 128m,chieu rong bang 3phan5 chieu dai .Tinh dien tich hinh chu nhat .
2/Mot manh vuon hinh chu nhat co chu vi 228m, chieu rong 40m .o giua manh vuon , nguoi ta dao 1 cai ao hinh vuong canh 10m .Tinh dien tich phan dat con lai .
3/Mot thua ruong hinh thang co day lon la 69m,day be 2phan3 day lon va chieu cao bang 3 phan 4 tong do dai hai day.
a/Tinh dien tich thua ruong do
b/Trung binh 100m vuong thua ruong thu hoach duoc 70 kg thoc. Hoi ca thua ruong thu hoach duoc bao nhieu ki lo gam thoc .
4/Mot hinh hop chu nhat co chieu cao bang trung binh cong cua dai va rong .Dien tich xung quanh cua hinh hop la 2500m vuong .Chieu dai hon chieu rong 20 cm .Tinh the tich hinh hop .
bai 1 : 1 manh dat hinh thang co day lon 2 , 8 dm day be 1, 6 dm chieu cao 0 , 8 dm a , tinh dien tich tam bia do b , nguoi ta can cat 1/4 dien tich . tinh dien tich tam bia con lai bai 2 : 1 thua ruong hinh thang co day be 26m day lon hon day be 8m day be hon chieu cao 6m trung binh cu 100m2 thu duoc 70,5 kg thoc . hoi ruong do thu duoc tat ca ? ta thoc bai 3 : hinh chu nhat ABC co chieu dai DC 27 cm chieu rong AD 20,4 m E la 1 diem tren AB . tinh dien tich hinh tam giac EDC ban nao giai ho...
Đọc tiếp
bai 1 : 1 manh dat hinh thang co day lon 2 , 8 dm day be 1, 6 dm chieu cao 0 , 8 dm
a , tinh dien tich tam bia do
b , nguoi ta can cat 1/4 dien tich . tinh dien tich tam bia con lai
bai 2 : 1 thua ruong hinh thang co day be 26m day lon hon day be 8m day be hon chieu cao 6m trung binh cu 100m2 thu duoc 70,5 kg thoc . hoi ruong do thu duoc tat ca ? ta thoc
bai 3 : hinh chu nhat ABC co chieu dai DC = 27 cm chieu rong AD = 20,4 m E la 1 diem tren AB . tinh dien tich hinh tam giac EDC
ban nao giai ho minh thi giai han ro ra nha
mot hinh thang vuong co day be bang 3/5 day lon va chieu cao la 23m .Nguoi ta mo rong thua ruong ve phia canh ben khong vuong goc voi hai day de thua ruong thanh hinh chu nhat .Sau khi mo rong dien tich tang len 207m2 .
a,Tinh dien tich hinh thang ban dau
b,Tinh xem sau khi mo rong dien tich tang len bao nhieu phan tram
ghi cach giai giup minh nhe .Cam on.