挑战习题
1
/5
单选题
难度:
1.知∠1与∠2互补,∠3与∠4互补,且∠1=∠3,那么()
A
∠2>∠4
B
∠2<∠4
C
∠2=∠4
D
∠2与∠4大小不确定
提示1:
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正确答案:
Qw==
4oi14oigMSviiKAyPTE4MMKw77yM4oigMyviiKA0PTE4MMKw77yM5LiU4oigMe+8neKIoDPvvIziiLTiiKAy77yd4oigNO+8iOetieinkueahOihpeinkuebuOetie+8iQ==
2
/5
单选题
难度:
2.下面关于余角、补角的说法,正确的是( )
A
若∠1+∠2+∠3=180°,则∠1、∠2、∠3互补
B
若∠1+∠2=90°,则∠1与∠2互余
C
若∠1+∠2=180°,则∠1与∠2互余
D
一个角的余角和它的补角相等
提示1:
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正确答案:
Qg==
Qe+8jumUmeivr++8jOS6kuS4uuihpeinkuaYr+S4pOS4quinkueahOWFs+ezu++8jOS4jeaYr+S4ieS4quinku+8m0Mu6ZSZ6K+v77yM6L+Z5Lik6KeS5LqS5Li66KGl6KeS77yM77yk77yO6ZSZ6K+v44CC5Y+v6K6+6L+Z5Liq6KeS5Li6772Y77yM5YiZ5a6D55qE5L2Z6KeS5Li677yI77yZ77yQ77yN772Y77yJ77yM5a6D55qE6KGl6KeS77yI77yR77yY77yQ77yN772Y77yJ77yM5L2Z6KeS6KGl6KeS5LiN55u4562J44CC5pWF6YCJQg==
3
/5
单选题
难度:
3.∠α+∠β=90°,∠β+∠γ=90°,则下列等式正确的是 ( )
A
∠α=∠β
B
∠β=∠γ
C
∠α=∠β=∠γ
D
∠α=∠γ
提示1:
5ZCM6KeS55qE5L2Z6KeS55u4562J
正确答案:
RA==
4oi14oigzrEr4oigzrI9OTDCsO+8jOKIoM6yK+KIoM6zPTkwwrDvvIzkuJTlkIzop5LnmoTkvZnop5Lnm7jnrYnvvIziiLTiiKDOsT3iiKDOs++8jOmAiUQ=
4
/5
单选题
难度:
4.互余的两个角中,较大角是较小角的5倍,求这两个角的度数
A
25°,65°
B
20°,70°
C
35°,45°
D
15°,75°
提示1:
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正确答案:
RA==
6Kej77ya6K6+6L+Z5Lik5Liq6KeS5bqm5pWw5Li6eOW6puWSjO+8iDkwLXjvvInluqbjgILmlrnnqIvvvIzlvpfvvJo1eD05MC14LHg9MTUu5pWF6YCJRA==
5
/5
单选题
难度:
5.已知一个角的补角是128°37′,那么这个角的余角是____。
A
38°
B
38°17′
C
30°37′
D
38°37′
提示1:
5YiX5pa556iL6Kej5Yaz6Zeu6aKY
正确答案:
RA==
6Kej77ya6K6+6L+Z5Liq6KeS5Li65bqm5pWw5Li6eC7iiLUxODDCsC0xMjjCsDM34oCyPXgs5YiZ6L+Z5Liq6KeS55qE5L2Z6KeS5Li677yaOTDCsC14PTkwwrAt77yIMTgwwrAtMTI4wrAzN+KAsu+8iT0tOTDCsCsxMjjCsDM34oCyPTM4wrAzN+KAsg==