长丰县实验高级中学2016-2017学年第一学期九年级年级数学学科

n"#$%&'()*+.\r,-.&P/01 B3C 56@ABCD'9 6@P`p:;?\r@?<;?@#=.\r>.<?@!ABBCDE&FG?.HI\rJ;K&=LM"%NOP.\r=05 BE_LAD, CF_LAD,WXPKJ E3F , Y BE=23m.\r1\r RtZXABE dtan oc / i - /n = / ,o o oc / 30°.\r73 3\rAB=2BE=46(m)\rlm.“ = o p q \rA E r A E\rAE=236 (m).\rC F 1\r RtZXCFD i - ... = /,\rF D 1.\r.M.FD=CF=23(m).\rZ.AD=AE+EF+FD= 2373 + 6 + 23 = 29 + 2 3 v l = 68. 8(in).\rG0stABu 46m,t?a vw30° , xyzAD{J68. 8m.\r|}~@€1‚AB!'Bƒ„…=t†‡ˆ‰Š\r'‡0\r‹ŒŽ 6@P`J?\n@??@.\r‘ t † i ’t“”•–—˜™š01=1211› ,t † =œ  ž\rŸ z†/\r¢£¤¥¦§¨©ª3?«'™š¬ £.\r3­®¯…0\r.&„…0=?\n@°±²?\n@˜™³´€1µ\r¶£·¸0@'¹º»'u†¼?'½¯.P/‡°¾\r¿À¸ÁÂ0@ÃÄ0'»?•–'™šÅÆ£.ÇÈ> É\rÊ$3Ë̸Í.\rÎ3ÏÐ5Ñ\r­P122ÒÓ”\rBC\rÔÊ