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(2007•怀化)如图,是用形状、大小完全相同的等腰梯形密铺成的图案,则这个图案...
(2007•怀化)如图,是用形状、大小完全相同的等腰梯形密铺成的图案,则这个图案中的等腰梯形的底角(指钝角)是
度.
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