题目内容
∠α=39°22′,则∠α的补角为( )
A.39°22′ | B.139°22′ | C.140°38′ | D.50°38′ |
∠α的补角=180°-∠α
=180°-39°22′
=140°38′.
故选:C.
=180°-39°22′
=140°38′.
故选:C.
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题目内容
A.39°22′ | B.139°22′ | C.140°38′ | D.50°38′ |