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OpenStudy (anonymous):
ABCD is a rectangle. If AC = 2(5a + 1) and BD = 2(a + 1), find the length of each diagonal.
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OpenStudy (mathstudent55):
The diagonals of a rectangle are congruent. That means 2(5a + 1) = 2(a + 1) Solve the equation for a. Then insert the value of a into either of the original expressions.
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