AreaQPerimete.ir i △ ABC 2 OA-OD.BD-2CD.LABC , 40cm , shadedltrea-7.AE ˋ o " 1" E . B C D ABCD 2 dìagonds BD △ PAB , = △ PBD , 4, △ PBC = 17 ? = 2E-e PADtBETABCD-ABD-ABD-AD-PBC-h PBTFPBC-ABTHFE.LI A "" - f. P . " ' " B 3 2021/10/28 D ' " " C 2 ABCD = 24cm , diagond AGBD 0 , E OGEF cnn.shade.cl/trea=?A FBa 愳 6 = 2 D TSEAEAEREEG CG6rnsb.CA △ = △ 陫 _ 5 沙迦 E ⼆ 胩 望 4 2 c 舆 0_ABFtCGDABCD-ICAEtB.DE CAETBDE ⼆⽉了 ( ⼀ = 24 - 42 - 2 ) -0 邸) 6 = - - 130( 0 8 2 - Rt AE-2CE.B.is 4 ABC 位 渗 E 㖉 ⽔ 9 F 亿 | . = ( 式似 或叫 È ⼆ , AE9CM.cl) =1 6 ? ⼏ ⼏ D 1 C 6 2 1 6cm 6cm 2 DFC 先 =_= , △ ABD E 7 . H C 144 )( EH -4cm , = D A 2 普 塔 ŌÈED E " AB-3.cm , △ BCE △ = 28 1 3 6 i BDEF , △ ABC A _ ACXBCAFEQCEPsmiwABZIB.ci B Rt △ ABC . ? = 法 (华浩) = 5 , 120 cnn.is 2 2 12 - , ABDE , A C 900 , ? , △ = 12 BEF 𦏸 ABCD , M AB 5 - . B D , 5152 , 7 C s, M.nl/MM.N.SzA D 8-Trapez.im/tBcD AEF △ = = 3 cmi.DE FC , , ? A 啊 肶⽐ 谁 昨 D , 化 , s.is SFS-us.ofiAn.EC S2 • . F 渐 _ hioAEF-ADEGWSDABCDt.is 培 耀应○ 㖌 - 4 B 所5 1 53 ¥ c , 如 ⼼的 2 6cm 9 1cm 24 + ! 6 - 6 2 1 6 6 dT 1 = 25 = 5件 = , 5 让 ? 10 AB . BEFJ , CHGJ = 3 , i z-H-i-r.nl 3 J = 1, DIGH AEFI = 4 = 2 , ? =