1、A1A2A3图1baSm2m1S2S1图2ST图3S原题再现原题再现: :A4A5 本题第本题第1 1问,已知两小问,已知两小正方形的边长,求大正方形正方形的边长,求大正方形的面积及两直角三角形的面的面积及两直角三角形的面积和。积和。m2m1S2S1图图2S图图1baSA62ab图图1baSPHEDQFCKGBAm2m1S2S1图图2 2abA7T图3SA8?图2?E?D?m?2?m?1?S?2?S?1?C?B?AKQFGP图1baSA9FGKPQABCNMT图3SA102222221()421()()2ABCABGFCBGFCSSSabababa b a b a bab 221;2=SabS
2、abFGKPQABCNMT图图3SaabbA11WRFGKPQABCNMT图图3SWRFGKPQABCNM图图3STA12 理由理由: : ODABCNMA13PEFDGHCBA又证又证A14 S SHDPNFGHDPNFG=2S=2SADOFADOF=10=10EPNCBOGHMFDABGHCAA15CBCBEDACBEDAFNACBGHEMA16条件:条件: HAB+GAC=180HAB+GAC=180 结论:结论: S SAHGAHG=S=SABCABCA17图1baSm2m1S2S1图图2ST图图3SA18T图3SFGACBNMDQA19A20PODEFGHMNCBA易证易证 A21说题目说题目A221.说题目说题目A23