① 鎬庝箞鐢ㄩ暱鏂瑰艦綰告姌鍑75搴,150搴︾殑瑙,瑕佹湁鍥懼摝
灝嗘姌濂界殑150º瑙掑瑰崐鎶橈紝灝卞緱鍒75º瑙掋
灝嗘ｆ柟褰㈠規姌銆愯竟瀵硅竟銆戞姌鎴愮殑1/2姝ｆ柟褰錛堝嵆闀挎柟褰錛夊悇鐐逛負ABCD錛孉B涓洪暱杈廣
浠A鐐逛負涓蹇冿紝灝咥B杈瑰悜CD杈規姌錛屼嬌B鐐硅惤鍦–D杈逛笂錛屾ゆ椂鈭燘EC錛30搴 鏍規嵁鏄鐩磋掍笁瑙掑艦涓錛屽傛灉涓鐩磋掕竟絳変簬鏂滆竟鐨勪竴鍗婏紝閭ｄ箞榪欐潯榪欏彨杈規墍闃熺殑瑙掍負30搴︼級 鎵浠ュ啀鎶30搴﹁掔殑涓琛ヨ瀵規姌錛屾墍浠ヤ竴涓瑙掑嵆涓75搴︼紙180-30=150錛150/2=75錛
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鎵╁睍璧勬枡錛
鏁板︿笂鏄鐢ㄥ姬搴﹁岄潪瑙掑害錛屽洜涓360鐨勫規槗鏁撮櫎瀵規暟瀛︿笉閲嶈侊紝鑰屾暟瀛︿嬌鐢ㄥ姬搴︽洿鏂逛究銆傝掑害鍜屽姬搴﹀叧緋繪槸錛2蟺寮у害=360擄銆備粠鑰1擄鈮0.0174533寮у害錛1寮у害鈮57.29578擄銆
瑙掑害杞鎹涓哄姬搴﹀叕寮忥細寮у害=瑙掑害梅180脳蟺
寮у害杞鎹涓鴻掑害鍏寮忥細 瑙掑害=寮у害脳180梅蟺
鍙傝冭祫鏂欐潵婧愶細鐧懼害鐧劇-瑙掑害
② 濡備綍鐢ㄤ竴寮犻暱鏂瑰艦綰告姌鍑90搴︺45搴︺135搴︾殑瑙掞紵
鐢ㄤ竴寮犻暱鏂瑰艦綰告姌鍑轟笅闈㈠害鏁扮殑瑙掑悧90搴45搴135搴︽柟娉曞備笅錛
鎴戜滑鍙浠ヤ嬌鐢ㄩ暱鏂瑰艦綰告姌鍙犲嚭90搴︺45搴﹀拰135搴︾殑瑙掋 棣栧厛錛屽皢闀挎柟褰㈢焊瀵規姌錛屽彲浠ュ緱鍒頒竴涓90搴︾殑瑙掋 鎺ヤ笅鏉ワ紝灝嗛暱鏂瑰艦綰告部瀵硅掔嚎瀵規姌錛屽彲浠ュ緱鍒頒竴涓45搴︾殑瑙掋
鏈鍚庯紝灝嗛暱鏂瑰艦綰告部瀵硅掔嚎鍐嶆″規姌錛屽彲浠ュ緱鍒頒竴涓135搴︾殑瑙掋 鍥犳わ紝鎴戜滑鍙浠ョ敤涓寮犻暱鏂瑰艦綰告姌鍙犲嚭90搴︺45搴﹀拰135搴︾殑瑙掋
姝ｈ掑拰璐熻
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鍦ㄤ簩緇寸殑絎涘崱鍎垮潗鏍囩郴涓錛岃掍竴鑸鏄浠x杞寸殑姝ｅ悜涓哄熀鍑嗭紝鑻ュ線y杞寸殑姝ｅ悜鏃嬭漿錛屽垯鍏惰掍負姝ｈ掞紝鑻ュ線y杞寸殑璐熷悜鏃嬭漿錛屽垯鍏惰掍負璐熻掋傝嫢浜岀淮鐨勭瑳鍗″効鍧愭爣緋諱篃鏄痻杞存湞鍙籌紝y杞存湞涓婏紝鍒欓嗘椂閽堢殑鏃嬭漿瀵瑰簲姝ｈ掞紝欏烘椂閽堢殑鏃嬭漿瀵瑰簲璐熻掋
涓鑸鑰岃█錛−胃瑙掑拰涓鍦堝噺鍘晃告墍寰楃殑瑙掓槸鐩稿悓鐨勩備緥濡−45擄鍜360擄−45擄錛=315擄錛夌瓑鏁堬紝浣嗚繖鍙閫傜敤鍦ㄧ敤瑙掕〃紺虹浉瀵逛綅緗錛屼笉鏄鏃嬭漿姒傚康鏃躲傛棆杞−45擄鍜屾棆杞315擄鏄涓嶅悓鐨勩
鍦ㄤ笁緇寸殑鍑犱綍涓錛岄『鏃墮拡鍙婇嗘椂閽堟病鏈夌粷瀵圭殑瀹氫箟錛屽洜姝ゅ畾涔夋ｈ掑強璐熻掓椂鍧囬渶鍒楀嚭鍏跺弬鑰冪殑鍩哄噯錛屼竴鑸浼氫互涓涓閫氳繃瑙掔殑欏剁偣錛屽拰瑙掓墍鍦ㄥ鉤闈㈠瀭鐩寸殑鍚戦噺涓哄熀鍑嗐