郑州市金水区2023-2024学年数学七年级第一学期期末统考模拟试题含解析

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ZAOC+ZBOD=ZAOC+ZAOD+ZAOC+ZBOC=ZCOD+ZAOB=90°+90°=180

ZAOC+ZBOD=Z=180°,

145°,180°;

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55

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0.5«+0.5x(1+20%)x(100-a)=54,

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114%;

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0.5x60+(x—60)x0.5xl20%=0.56x,

WW;x=150,

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17

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12

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JM^=-5x-x(-2)--x(-2)2

52

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