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共找到 421 与∠BAD=∠C 相关的结果,耗时63 ms
如图,已知海岛A与海岸公路BC的距离为50km,B、C间的距离为100km,从A到C,必须先坐船到BC上某一点D,船速为25km/h,再乘汽车,车速为50km/h.设∠BAD=θ.记∠BAD=α(α为确定的锐角,满足tanα=1
数学
函数t(θ),并指出函数的定
证明:四边形ABCD是菱形AE//BF,AC平分<BAD,且交BF于点C,BD平分<ABC,且交AE于点D,连接CD.求证:四边形ABCD是菱形.
数学
Don't eat sweet food_____.It's bad for your teeth.A any B more C any more D any long要原因
英语
Do not eat sweet food____,It is bad for you.a.any b.more c.any more d.any longgood luck____your new diet a.to b.for c.with d.atwhat wo
英语
ld you like to
Do you know that ________ too much is bad for your health?A eat B to eat C ate D eating
英语
helen can i wear jeans and a t-shirt to the evening party-okbut a dress might be_____A good Bbetter C bad D worse
英语
Tom,you___play computer games too much.It is bad for your eyes.空里应该填什么有四个选项 A didn not B must not C would not D need not
英语
若以A(根号3,0)为顶点的抛物线y=ax²+bx+c与直线y=kx+m有两个公共点B(0,-1),C(3根号3,-4)(1)求直线BC和抛物线所对应的函数解析式;(2)若过点B的另一直线l与抛物线的另一个交点为D且∠BAD=90
数学
等边三角形PQR三个顶点中有
1.六面体ABCD-A'B'C'D'中,AB=5,AD=3,AA'=7,角BAD=60度,角BAA'=角DAA'=45度,求AC'的长2.正方体ABCD-A'B'C'D'棱长为a,求A'B和B'C夹角.求证:A'B垂直于AC'
数学
如图,在三角形ABC中,点D在BC上,∠ADE=∠C,∠CDE=∠BAD,判断∠B与∠C的关系,并说明理由
数学
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