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deng yao san jiao xing de duo jie xing ju li
Author(s): 
Pages: 23-25
Year: Issue:  11
Journal: School Journal of Mathematics

Keyword:  等腰三角形钝角三角形内角和直角三角形多解性题意直角边顶角底角类比较;
Abstract: <正>等腰三角形是一类比较特殊的三角形.其三边有腰与底边之分:其三个内角有顶角与底角之别.根据三角形内角和定理.其底角只能是锐角,而其顶角则是锐角、直角、钝角皆有可能.因此,当问题中等腰三角形的腰与底边的位置未确定或顶角与底角未确定时.常常存在多解性.
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