ANSWERS: 1
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These 2 co-ordinates produce a triangle. The lengths of the triangle can be calculated using the Pythagoras' theorem. The 2 co-ordinates have in the horizontal direction a length of (5 - 1) units = 4 units. The vertical direction is of length (4 - 2) units = 2 units. The slanted hypothenuse is sqrt(4^2 + 2^2) = sqrt(20) = 4.472 units long. You may visit the math site http://mathsisinteresting.blogspot.com to gather some wonderful information regarding math.
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