If a(x¹,y¹), b(x²,y²), c(x³,y³) and d(x⁴,y⁴) form two line sements ab and cd which condition needs to be met to prove ab is perpendicular to cd

A(x1, y1), B(x2, y2), C(x3, y3), D(x4, y4) form line segments AB and CD

For AB to be perpendicular to CD, triangle ABC should be a right angle or AC^2 = AB^2 + BC^2

(x3-x1)+(y3-y1) = (x2-x1)+(y2-y1) + (x3-x2)+(y3-y2)

If this is equal we can say AB is perpendicular to CD

Hope this helps!

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