英语翻译In quadrilateral ABCD,AB=77m.BC=120m,CD=60m and diagonal
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/28 17:17:27
英语翻译
In quadrilateral ABCD,AB=77m.BC=120m,CD=60m and diagonal AC=55m.Angle CAD=45°,angleBAC=x°and angleADC=y°.
(a)Calculate the value of x.
(b)Calculate the value of y.
(c)The bearing of D from A is 90°,find the bearing of
(i)A from C,
(ii)B from A
![](http://img.wesiedu.com/upload/8/60/86083268756353e3e9456a0f5861b240.jpg)
In quadrilateral ABCD,AB=77m.BC=120m,CD=60m and diagonal AC=55m.Angle CAD=45°,angleBAC=x°and angleADC=y°.
(a)Calculate the value of x.
(b)Calculate the value of y.
(c)The bearing of D from A is 90°,find the bearing of
(i)A from C,
(ii)B from A
![](http://img.wesiedu.com/upload/8/60/86083268756353e3e9456a0f5861b240.jpg)
![英语翻译In quadrilateral ABCD,AB=77m.BC=120m,CD=60m and diagonal](/uploads/image/z/17659117-37-7.jpg?t=%E8%8B%B1%E8%AF%AD%E7%BF%BB%E8%AF%91In+quadrilateral+ABCD%2CAB%3D77m.BC%3D120m%2CCD%3D60m+and+diagonal)
利用余弦定理
cos(x)=(ab^2+ac^2-cb^2)/2ab*ac
ad^2+ac^2-cd^2=2ac*ad*cos(cad)
cos(x)=(ab^2+ac^2-cb^2)/2ab*ac
ad^2+ac^2-cd^2=2ac*ad*cos(cad)
四边形ABCD中,角A=60,AB垂直BC,CD垂直AD,AB=200m,CD=100m,求AD,BC的长.
如图,角B=90°,AB=4m BC=3m CD=13m DA=12m求四边形ABCD的面积
已知:如图所示,梯形ABCD中,AB∥CD,且AB+CD=BC,M是AD的中点.
在直角梯形ABCD中,AB‖CD,角ABC=90°,AB+DC=BC,其中AB=m,CD=n,且m
直角梯形ABCD中,AB平行CD,角C=90度,AB=BC,M为BC边上一点..
在梯形ABCD中,AD平行BC,M是AB的中点,DM垂直CM.求证:CD=AD+BC
如图,在三角形abcd中,角a=60°,ab⊥bc,ad⊥cd,ab=200m,cd=100m,求 ad,bc的长(精确
1.在四边形ABCD中,∠A=60°,AB⊥BC,AD⊥CD,AB=200m,CD=100m,则AD,BC的长.
梯形ABCD中,AB//CD,M,N分别是DA,BC中点,且DC/AB=k
如图,在四边形地块ABCD中,∠B=90°,AB=30m,BC=40m,CD=130m,AD=120m.求这块地的面积
在等腰梯形ABCD中,AD//BC,AB=CD,E、N、F、M分别是边AB、BC、CD、DA的中点,且EF^2+MN^2
某农民承包了一块四边形水稻田ABCD,他量得边长AB=90m,BC=120m,CD=130cm,DA=140m,且边AB