神马作文网whoever is good at English and Math,pleaz come in.
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whoever is good at English and Math,pleaz come in.
a rectangle with a diagonal of length x is twice as long as it is wide.what is the area of the rectangle?
please explain how u did it.thank u very much!i appreciate it.
a rectangle with a diagonal of length x is twice as long as it is wide.what is the area of the rectangle?
please explain how u did it.thank u very much!i appreciate it.
Assume that its width is a.Accordingly,the length of the rectangle is 2a.
So we can establish a mathematical equation like that:
a^2 + (2a)^2 = x
The result is:a = x/(square root 5)
Then we can make out the area of the rectangle :S = a * 2a = 0.4x^2
So we can establish a mathematical equation like that:
a^2 + (2a)^2 = x
The result is:a = x/(square root 5)
Then we can make out the area of the rectangle :S = a * 2a = 0.4x^2
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