挑战习题
1
/5
单选题
难度:
1.下面各图中∠1和∠2是对顶角的是( )
A
B
C
D
提示1:
IOagueaNruWvuemhtuinkueahOWumuS5ieWvueWQhOmAiemhueWIhuaekOWIpOaWreWQjuWIqeeUqOaOkumZpOazleaxguinow==
正确答案:
Qg==
6Kej77yaQeOAgeKIoDHlkoziiKAy5LiN5piv5a+56aG26KeS77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPkLjgIHiiKAx5ZKM4oigMuaYr+Wvuemhtuinku+8jOaVheacrOmAiemhueato+ehru+8mzxicj5D44CB4oigMeWSjOKIoDLkuI3mmK/lr7npobbop5LvvIzmlYXmnKzpgInpobnplJnor6/vvJs8YnI+ROOAgeKIoDHlkoziiKAy5LiN5piv5a+56aG26KeS77yM5piv6YK76KGl6KeS77yM5pWF5pys6YCJ6aG56ZSZ6K+vLiA8YnI+5pWF6YCJQi4g
2
/5
单选题
难度:
2.如图,直线AB和CD相交于点O,若∠AOC=125°,则∠AOD=( )
A
50°
B
55°
C
60°
D
65°
提示1:
IOagueaNrumCu+ihpeinkueahOWSjOetieS6jjE4MMKw5YiX5byP6L+b6KGM6K6h566X5Y2z5Y+v5b6X6Kej
正确答案:
Qg==
6Kej77ya4oi14oigQU9DPTEyNcKw77yMPGJyPuKItOKIoEFPRD0xODDCsC0xMjXCsD01NcKwLiA8YnI+5pWF6YCJQi4g
3
/5
单选题
难度:
3.如图,直线AB、CD相交于O点,∠AOD+∠BOC=236°,则∠AOC=( )
A
72°
B
62°
C
124°
D
144°
提示1:
IOeUseS4pOebtOe6v+ebuOS6pO+8jOWvuemhtuinkuebuOetie+8jOWPr+W+l+KIoEFPRD3iiKBCT0PvvIzlt7Lnn6XiiKBBT0Qr4oigQk9DPTIzNsKw77yM5Y+v5rGC4oigQU9E
提示2:
IOKIoEFPQ+S4juKIoEFPROS6kuS4uumCu+ihpeinku+8jOWNs+KIoEFPQyviiKBBT0Q9MTgwwrDvvIzlsIbiiKBBT0TnmoTluqbmlbDku6PlhaXvvIzlj6/msYLiiKBBT0Mu
正确答案:
Qg==
6Kej77ya4oi14oigQU9E5LiO4oigQk9D5piv5a+56aG26KeS77yMPGJyPuKItOKIoEFPRD3iiKBCT0PvvIw8YnI+5Y+I5bey55+l4oigQU9EK+KIoEJPQz0yMzbCsO+8jDxicj7iiLTiiKBBT0Q9MTE4wrAuIDxicj7iiLXiiKBBT0PkuI7iiKBBT0TkupLkuLrpgrvooaXop5LvvIw8YnI+4oi04oigQU9DPTE4MMKwLeKIoEFPRD0xODDCsC0xMTjCsD02MsKwLiA8YnI+5pWF6YCJQi4g
4
/5
单选题
难度:
4.如图,已知直线AB,CD相交于点O,OA平分∠EOC,∠EOC=100°,则∠BOD的度数是( )
A
20°
B
40°
C
50°
D
80°
提示1:
IOWIqeeUqOinkuW5s+WIhue6v+eahOaAp+i0qOWSjOWvuemhtuinkuebuOetieWNs+WPr+axguW+lw==
正确答案:
Qw==
6Kej77ya5Zug5Li64oigRU9DPTEwMMKw77yMT0HlubPliIbiiKBFT0PvvIzmiYDku6XiiKBCT0Q94oigQU9DPTxpbWcgd2lkdGg9NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQi82OS9yQkFDRTFOclkzRER3Rms3QUFBQkdlTXF2UEUxMDEucG5nIj7DlzEwMMKwPTUw5bqmLiA8YnI+5pWF6YCJQy4g
5
/5
单选题
难度:
5.如图所示,直线AB与CD相交于O点,∠1=∠2. 若∠AOE=140°,则∠AOC的度数为( )
A
40°
B
60°
C
80°
D
100°
提示1:
IOeUseS6juKIoEFPRSviiKBCT0U9MTgwwrDvvIziiKBBT0U9MTQwwrDvvIzmmJPmsYLiiKAyPTQwwrA=
提示2:
IOKIoDE94oigMu+8jOWImeKIoEJPRD04MMKw77yM5Yip55So5a+56aG26KeS5oCn6LSo5Y+v5rGC4oigQU9D
正确答案:
Qw==
6Kej77ya4oi14oigQU9FK+KIoEJPRT0xODDCsO+8jOKIoEFPRT0xNDDCsO+8jDxicj7iiLTiiKAyPTQwwrDvvIw8YnI+4oi14oigMT3iiKAy77yMPGJyPuKItOKIoEJPRD0y4oigMj04MMKw77yMPGJyPuKItOKIoEFPQz3iiKBCT0Q9ODDCsC4gPGJyPuaVhemAiUMuIA==