问题
选择题
∠α=39°22′,则∠α的补角为( )
A.39°22′
B.139°22′
C.140°38′
D.50°38′
答案
∠α的补角=180°-∠α
=180°-39°22′
=140°38′.
故选:C.
∠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.