寒假知多少~
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
Standards-aligned
Melody Meng
Used 42+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
勾股定理的内容是_______
如果三角形的三边长a,b,c,有关系:a2+b2=c2,那么这个三角形是直角三角形
三角形两条直角边的平方和等于斜边的平方
直角三角形两条直角边的平方和等于斜边的平方
2.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
下列哪一种是用HL证明三角形全等?
如果两个直角三角形的斜边和一条直角边分别对应相等,那么这两个直角三角形全等。
如果两个三角形的两组对应边及其夹角分别对应相等,那么这两个三角形全等
如果两个三角形的三边对应相等,那么这两个三角形全等
如果两个三角形的两组对应角及其夹边分别对应相等,那么这两个三角形全等
3.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
角平分线上的点到_____的距离相等,线段垂直平分线上的点到____的距离相等
角的两端,线段两边
线段两边,角的两端
线段两端点,角的两边
角的两边,线段两端点
4.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
下列哪一项不是等腰三角形的性质?
两腰相等
等腰三角形的顶角平分线所在的直线是它的对称轴
角平分线、高、中线互相重合
两底角相等
5.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
下列哪一条不可以判定等边三角形?
三条边都相等的三角形是等边三角形
三个角都相等的三角形是等边三角形
有一个角是30°的等腰三角形是等边三角形
有一个角是60°的等腰三角形是等边三角形
6.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
已知一个直角三角形的两边长分别为3和4,则第三边长的平方是
25
14
7
7或25
7.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
不等式的基本性质:(横线上填不等号)
性质1:如果a > b,那么 a + c____b + c
性质2:如果a > b,c > 0,那么 ac____bc
性质3:如果a > b,c < 0,那么 ac____bc
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