, z \rF_LCf F\r$hOE>~?AB>uo&3 ¹ º $\r.OELAB\r: OF VCD, AB = CD\r.OF=OE.\r>uo&3\r{|?m??e»PA B C ,n»A 8>\rt¼BCf P, PELACf E,\rVx?PE@&3\r" # 102.«°½¤3¢?£\rz3w&~?S53&¾¿À x?.\ri?m?? RtZiABC?NC=90?AC^ 12, BC = 9 , @ AB}.w?n 8>\r&3 ACf E ,V AD.\r??O E , OE_LAC\r"."BC1AC\r.OE//BC\r. OE AO\r Rt^ABc ?AB= VAC2 + B C 2 = 7 i2 2 + 9 2 = 15\r. OE _ A B-O B _ 15-O E\r* *---- - -------------- -----------\r9 AB 15\r45\r..O E = O B = 4\r8\r45\r. B D = 2 O B = 4\r4\r.AD = AB-DB = 1544°4= 4\r4 4\r?A&>\r4.\r{|?m??&~CM_L08,w P B &}?A P tf D z D\rÁ\r&3CEt P f C , Vx?PC=CD\rP
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