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Given square ERTN, what is the length of NT ?

Given square ERTN, what is the length of NT ?-example-1
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Answer:

|NT| = 25

Explanation:

The four sides of this square all have the same length. Thus, 5x = 10x - 25, which, in turn, becomes 25 = 5x, giving us x = 5. The length of NT is 5(x), or |NT| = 25.