1.180-x=3(90-x)
2x=90
x=45
2.∵OA⊥OC于O,OB⊥OD于O,∠AOD=3∠BOC
∴180-∠BOC=3∠BOC
180=4∠BOC
∠BOC=45
1.一个角的邻补角是这个角的余角的3倍,求这个角.
1.一个角的邻补角是这个角的余角的3倍,求这个角.
2.如图5-1-2-2.,OA⊥OC于O,OB⊥OD于O,且∠AOD=3∠BOC,求∠BOC的度数.
2.如图5-1-2-2.,OA⊥OC于O,OB⊥OD于O,且∠AOD=3∠BOC,求∠BOC的度数.
数学人气:895 ℃时间:2020-05-07 10:47:00
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