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這個題其實就是要證相似全等三角形.因為∠BAE=∠EAH,∠EBA=∠AHE,∠BEA=∠HEA.所以三角形ABE與三角形AHE相似.三角形ABE與三角形AHE有共同邊AE,AE=AE,所以三角形ABE與三角形AHE全等.AH=AB.
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