湖南省邵陽(yáng)市綏寧縣2023-2024學(xué)年七年級(jí)數(shù)學(xué)第一學(xué)期期末質(zhì)量跟蹤監(jiān)視試題含解析

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A.5cmB.6cmC.7cmD.8cm

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15.M,QfclAABC10cm,BO,COWZABCWZACB,ODZBC^^D,JLOD=0.8cm,AABC

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16.Suffi,gW/TWWI'MM,Mf?A&￡30%,60°,

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19.(5#)^BWAa^JS??

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20.(8#)?±aA?^W&>gii,^M,A^J^W?Wf?4èfi,a,

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àsasù,igwra]^/,^rA^aoA'&ù^a.MP=MA,A/a<J<;

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21.(105?M,AM//BN,ZA=(AY.(^?A/FM-a-),BC^ftZABP^AMf&

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22.(105?EM?,ZDOE=90°.

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23.(125?B&M,?SMA>BBa,n+6,AW5

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21.(1)120°;(2)60°;(3)AAPB=2ZADB,SèMtf?.

[WJ(1)?OWH?,

(2)Z.CBP=1AABP,ZPBD-—ZPBN,ZCBD=-ZABN,(1)+

222

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[#￡?](1)’.’AMIIBN,

ZA+ZABN=180°.

.’.ZABN=180°-ZA=180°-60°=120°;

(2)'.'BC^ftZABP,BD^ftZPBN,

ZCBP=-ZABP,ZPBD=-ZPBN,

22

VZCBD=ZCBP+ZPBD,

ZCBD=-(ZABP+ZPBN)=-ZABN=-x120°=60°;

222

(3)ZAPB=2ZADB,

'2AM//BN,

ZAPB=ZPBN,ZADB=ZDBN,

BD^ftZPBN,

ZPBN=2ZDBN,

ZAPB=2ZADB.

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22,(1)?115°;(2)ZAOD=50°

(1)?&*&ZAODm&,

&MMZCOE,ZBOEmm^iti^-,

(2)te&?T&ZBOE=2x,^]ZAOE=7x,&fàfaZBOE+ZAOE=1SO°,^tüZB0E=40°,

ZAOD=90°—40°=50°.

f?TOtfr:(1)?':OD￥ftZAOC,ZAOC=130°,

:.ZAOD=ZDOC=-ZAOC=-X130°=65°,

22

:.ZBOD=WP-ZA6)D=180°-65o=115°;

?\'ZDOE=W°,\ZDOC=65°,

ZCOE=ZD