...形abc中,∠bac等于阿尔法,如图(1)∠abc与∠acb的角平分线交于o点...
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发布时间:2024-10-21 10:16
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热心网友
时间:2024-10-21 10:30
△boc中,
∠boc = 180°- ∠obc - ∠ocb
= 180°- ∠abc/2 - ∠acb/2
= 180°- (∠abc + ∠acb)/2
= 180°- (180°- ∠bac)/2
= 180°- (180° - α)/2
= 180°- 90° + α/2
= 90° + α/2
热心网友
时间:2024-10-21 10:31
如图?在哪儿?求……啥?