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【模拟试题】一.判断下列图形中,有没有对顶角,若有请写出哪两个角1.413252.1487235691210113.12347564.125.1423二.解答题:1.已知:直线AD、BC交于O点,AOBCOD110,求:COD的度数。ABOCD2.已知:如图直线AB与CD交于O点,3180,求:2的度数。A4D21C3BO3.已知:直线AB、EF相交于O点,CDAB于O点,EOD12819,求BOFAOF,CEAOBFD三.过P点,画出OA、OB的垂线或画出AB、CD的垂线。1.APOB2.AOPB3.BAPCD4.APBO【试题答案】一.1.14与是对顶角2.132457689111012与,与,与,与,与,与是对顶角。3.2314与,与是对顶角4.无5.无二.1.AOBCODAOBCOD552.3118031801503130又122503.AODAOEEODAOD9012819903819BOFAOE3819又BOFAOF180AOF180381914141三.1.APOB2.AOPB3.BAPCD4.APBO
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