网址:http://www.1010jiajiao.com/paper/timu/2336.html[举报]
16.△ABC三边分别是a,b,c,下列能够判断其是直角三角形的有( )
1∠A:∠B:∠C=1:2:32 a:b:c=1:2:33 4∠A=∠B+∠C
A.1个 B.2个 C.3个 D.4个
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|