陕西省某中学市2022-2023学年数学八年级第一学期期末联考模拟试题含解析

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2022-2023
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NA+ND=NC+NB$2
NP=45°$3
2NP=ND+NB.ூ5᪆௃1
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ð2
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VZA+ZD+ZAOD=ZC+ZB+ZBOC=180°,ZAOD=ZBOC,.,.ZA+ZD=ZC+ZB$2
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2ZDAP+ZD=ZP+ZDCP,জZPCB+ZB=ZPAB+ZP,ঝTNDABèNBCDḄ#ᑖ$APèCPAP,"NDAP=NPAB,ZDCP=ZPCB,জ+ঝ29ZDAP+ZD+ZPCB+ZB=ZP+ZDCP+ZPAB+ZP,ᓽ2ZP=ZD+ZB=50°+40°,,ZP=45°$3
ᐵ92NP=ND+NB$ôÐð2
.26ஹ3

17ூᑖ᪆௃ᐜ᪷!rG*Ḅᕜr2ᑮa+b=8,ᯠPQ᪷!=>Ḅ#Gè61,ᓽa2+b2=l$ᨬP¯*öᐰ#G-.'(abḄÝᓽlூ45௃59*."+6=16+2=8,.\(a+b)2=a2+2ab+b2=2.,a2+b2=i,:.ab=3.ூ௃⚪ὃ÷.ᑖ5Ḅᵨøe⚪Hஹ[ᔜÎùÉḄᐵowᮣûᵨöᐰ#G-.C5⚪ḄᐵD.