帮我做一道英语数学题when the base and height of an isosceles right tri
4个回答
当等腰直角三角形的底与高各减少4,其面积减少72.原三角形的高是多少.
设原三角形底=高=X (因为等腰直角,所以底=高).
(X^2)/2-[(x-4)^2]/2=72
4x-8=72
x=20
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