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如图,已知AD=BC,AC=BD.(1)求证:△ADB≌△BCA;(2)OA与OB相等吗?若相等,请说明理由.
题目详情
如图,已知AD=BC,AC=BD.
(1)求证:△ADB≌△BCA;
(2)OA与OB相等吗?若相等,请说明理由.
(1)求证:△ADB≌△BCA;
(2)OA与OB相等吗?若相等,请说明理由.
▼优质解答
答案和解析
(1)证明:∵在△ADB和△BCA中,
,
∴△ADB≌△BCA(SSS);
(2) OA=OB,
理由是:∵△ADB≌△BCA,
∴∠ABD=∠BAC,
∴OA=OB.
|
∴△ADB≌△BCA(SSS);
(2) OA=OB,
理由是:∵△ADB≌△BCA,
∴∠ABD=∠BAC,
∴OA=OB.
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