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If a right triangle has 2x and 2x+1, what is the length of

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by Max@Math Revolution » Sun Feb 21, 2016 9:06 pm
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If a right triangle has 2x and 2x+1, what is the length of BC, in terms of x?

A. 4x-1
B. 4x+1
C. √(4x-1)
D. √(4x+1)
E. 4x


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by Max@Math Revolution » Wed Feb 24, 2016 9:09 pm
If a right triangle has 2x and 2x+1, what is the length of BC, in terms of x?

A. 4x-1
B. 4x+1
C. √(4x-1)
D. √(4x+1)
E. 4x


-> (2x)2+(BC)2=(2x+1)2, (BC)2=4x2+4x+1-4x2=4x+1, BC=√(4x+1). Therefore, the answer is D.
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