如圖，∠MAN是一鋼架，且∠MAN=18°，爲了使鋼架更加堅固，需在其內部添加一些鋼管BC，CD，DE，…添加...
問題詳情：如圖，∠MAN是一鋼架，且∠MAN=18°，爲了使鋼架更加堅固，需在其內部添加一些鋼管BC，CD，DE，…添加的鋼管長度都與AB相等，則最多能添這樣的鋼管 .【回答】4．詳解：∵BC=AB，∴∠BCA=∠A=18°，∴∠DBC=∠BCA+∠A=36°...
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