Question 504176
The line GH from (-3,2) to (3,-2) can be depicted as the hypotenuse of a triangle.
The other corner of the triangle is at  (-3,-2).
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a = vertical from (-3,-2) to (-3,2).  It has length 4.
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b = horizontal from (-3,-2) to (3,-2).  It has length 6.
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c^2 = 4^2 + 6^2
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c^2 = 16 + 36
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c^2 = 54
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c = sqrt(54)
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sqrt(54) = sqrt(9*6)
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sqrt(9*6) = 3*sqrt(6)
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c is approximately = 7.3485
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Done.