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錐面如何倒角? |
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點(diǎn)評(píng)
多謝這位師傅,這才是真正讓我茅塞頓開的回答!其實(shí)初中就學(xué)過的定理只是我早忘了,用了一晚上才搞明白B=90-A/2,切線定理居然忘了,哎!多謝啦,終于又解決了我的一個(gè)疑問,開心啊
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