八年级数学下册勾股定理中最短路径问题专题

1a2b2c23abc1a2b2c22a2b2c2()3450.3cm0.4cm0.5cm120cm6cm.21ABCC90AB6BC8DEABBE.2ABCC90AB6BC8AECAEEDAB,BE.3ABCDDBCFAEAB=CD=6AD=BC=10EC.1abc2dEDACBDEACB1ABA1B1DCD1C1242d22cba22bca22acb1hr2dAC+BC+AB=22rh.1AC1.2151020BC5ABBAAB1AA1AA16520cm3cm2cmABABBcm12cm4cm5cmP4Qcm111cm3cm6cm.A4BcmA4nBcm.1116nmi1ehA12nmi1ehA2h25m13m39m12m_______m2ABAO7mB24mAA'A'O15mBB'BB'()A3mB4mC5mD6m3112m226BA6cm3cm1cm1470A50C6BA1306AOB=90OA=45cmOB=15cmBAAOOBCBC?710mD20mAA8PABCPAPBPCBPPBQ=60BQ=BPOQ(1)APCQ(2)PAPBPC=345PQPQC9.ABXAB50kmABX10km40kmPAB.1APXPPABS1PA+PB2AXABAXPPABS2PA+PB.1S1S22S2PA+PB3Y3BY30kmXYPQPABQ..1RtABCAC6BC8()A24B24C252D2522(a)(b)(a)BAC90AB3AC4DEFGHIKLMJKLMJ()A90B100C110D1213PABCPA6PB8PC10PACAP'ABPP'PP'_______APB_______4ABDECDFIEFGH25916AEHBDCGFIBAPX1CS1S2S3S1S2S3_______41(a)90BAE90ACFDABFEABFERtBAERtBFE2(b)RtBEARtACD512ABCDBCCDACDADCABAC22BCCD22ABCABCD(ACBC)2AB24CD2