满分5 >
初中数学试题 >
如图,已知∠ABE=142°,∠C=72°,则∠A= 度,∠ABC= 度.
如图,已知∠ABE=142°,∠C=72°,则∠A=
度,∠ABC=
度.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506011_ST/images0.png)
考点分析:
相关试题推荐
函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506010_ST/0.png)
的自变量x的取值范围是
.
查看答案
已知一次函数y=kx+b的图象(如图),当x<0时,y的取值范围是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506009_ST/images0.png)
A.y>0
B.y<0
C.-2<y<0
D.y<-2
查看答案
已知
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506008_ST/0.png)
,那么下列等式中一定成立的是( )
A.x=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506008_ST/1.png)
y
B.9x=7y
C.7x=9y
D.xy=63
查看答案
用计算器探索:已知按一定规则排列的一组数:1,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506007_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506007_ST/1.png)
,…,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506007_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825771650614/SYS201310221648257716506007_ST/3.png)
,如果从中选出若干个数,使它们的和大于3,那么至少要选几个数( )
A.3个数
B.4个数
C.5个数
D.6个数
查看答案
已知两圆的半径分别为1和4,圆心距为3,则两圆的位置关系是( )
A.外离
B.外切
C.相交
D.内切
查看答案