河北省石家庄市赵县2021-2022学年八年级下学期期末数学试题

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103᪷+2Ḅyz1ḄXg¡¢ᓄ¤1ᓽᑮ¥ḄXg1de`Na⚪.22.15ᑖ¦᪥¨©ª“¬®1F឵1°±”ḄF³´µ.id¶᪥·ஹ@¸¹ᔜ»¼½¾20¿¬ÀḄ´µᡂ¡¢ÃÄÅᦈÇᦪ+·¸¹70,74,74,76,78,78,80,80,82,85,88,88,94,95,98,100,100,100,100,100c@¸¹64,68,70,72,74,80,82,82,84,86,90,92,98,98,98,100,100,100,100,100,100Åᑖ᪆ᦪ+ÉÊᦪ+ḄUᙳᦪஹÌᦪஹÍᦪ᝞⊤:¸¹UᙳᦪÌᦪÍᦪ·¸¹87100a@¸¹87b88᪷+`ÎÏÐ1NÑᑡÓ⚪:15ᑖᑏsÎÔ⊤Õa,bḄMc25ᑖ᪷+`Î᪵aᦪ+1×ض᪥·ஹ@¸¹Ù¸¹¬À“®”ÚÛÜÝÞßàᳮᵫc35ᑖáᡂÂᙠ80ᑖ`Î80ᑖãä1¶᪥·ஹ@¸¹ᐳᨵ800çè_ªé[´µêë1ì7è_é[´µêëᡂÂãäḄ¬ÀçᦪíîÞூᫀ௃1Na=86.5,b=1002N@¸¹¬À“®”ÚÛḄïÜÝ1ᳮᵫ᝞Ñ1𷸹^@¸¹¬ÀḄUᙳᑖ^Ìᦪ1ñ@¸¹¬ÀḄÍᦪᜧ󷸹¬ÀḄÍᦪ1ᡠ`@¸¹¬À“®”ÚÛḄïÜÝc3N·¸¹½¾Ḅ¬ÀᡂÂᙠ80ᑖ`Î80ᑖḄçᦪ14ç@¸¹½¾Ḅ¬ÀᡂÂᙠ80ᑖ`Î80ᑖḄçᦪ15çì7¶᪥·ஹ@¸¹è_é[´µêëᡂÂãäḄ¬Àçᦪ14y5x800=580ç.ூN᪆௃ூNN1·¸¹ḄÍᦪa=®ô=86.5@¸¹ḄÌᦪb=100:.a—86.5,b=100ூᑖ᪆௃1ᑭᵨÌᦪ^ÍᦪḄõö÷78V]KNᓽc2dUᙳᦪஹÌᦪ^ÍᦪḄឋùV]KNᓽc3ᐜKs¬ÀᡂÂᙠ80ᑖ`ÎḄúᑖï12\`800ᫀ஺

1123.5ᑖ᝞û1ᙠüýABCD1AB=BC=3,CD=V7DA=5,DB=90°,KBCDḄþᦪ1AC=y/AB2+BC2=V32+32=3V2□BAC=DBCA=45°,ÿCD=V7,DA=5,.\AC2+CD2=18+7=25,AD2=25,.*.AC2+CD2=AD2,/.DACD
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