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標題:
Questions about intersecting lines
發問:
Please help me solve these questions about intersecting lines. Also, please list procedures. http://www.flickr.com/photos/81115255@N00/2387605656/
最佳解答:
圖片參考：http://f20.yahoofs.com/hkblog/__DOT__HbRFnSbEwYw5k3nqAbVsnjrrg--_1/blog/ap_20080405122253260.jpg?ib_____DYwHBw085 1, ∠EAB = 56 ... alt. angles ∠CBF = 56 ... corr. angles ∠DBF = 133 - 56 ∠DBF = 77 ∠ABD = 180 - 77 ... adj. angles on st line ∠ABD = 103 x = 103 + 21 ... ext. angle of △ x = 124 2, ∠ABC = 42 ... alt. angles x = 32 + 42 ... ext. angle of △ x = 74 3, ∠ABC = 5x - 20 ... corr. angles ∠CBD = 180 - (5x - 20) ... adj. angles on st line 3x + 10 = 180 - (5x - 20) + 50 ... ext. angle of △ 3x + 10 = 180 - 5x + 20 + 50 8x = 240 x = 30 圖片參考：http://hk.yimg.com/i/icon/16/41.gif 請珍惜答問者心血 ，勿隨便取消或棄置問題 ，多謝大家合作 ！ 2008-04-05 13:04:50 補充： 抱歉, 打錯連結, 攪到你睇唔到幅圖!! @@" 請於此連結查看吧!! ^^" http://f20.yahoofs.com/hkblog/__DOT__HbRFnSbEwYw5k3nqAbVsnjrrg--_1/blog/ap_20080405122253260.jpg?ib_____DYwHBw085
其他解答:6CC7293C79127CE5
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