If the slope of one of these perpendicular lines is -1, the slope of the other line is

1 answer:

7 0

Should be a positive one. Usually the opposite line of perpendicular lines is the opposite sign, since your first slope was -1 the other slope should be +1

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P (10, -7) ⇒ x₁ = 10, y₁ = -7

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$\\\implies d=\sqrt{\bold{(7-10)}^2+\bold{(-10-(-7))}^2}\\\\\implies d=\sqrt{\bold{(-3)}^2+\bold{(-10+7)}^2}\\\\\implies d=\sqrt{9+\bold{(-3)}^2}\\\\\implies d=\sqrt{\bold{9+9}}\\\\\implies d=\sqrt{\bold{18}}\\\\\implies d=\sqrt{\bold{9}\times2}\\\\\implies d=3\sqrt{2}$