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Show that the points A(4, 6, -5), B(0, 2, 3) and C(-4, -4, -1) from the vertices of an isosceles triangle.

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To prove: Points A, B, C form isosceles triangle. 

Formula: The distance between two points (x1,y1,z1) and (x2,y2,z2) is given by

D = \(\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}\)

Here, (x1,y1,z1)= (4, 6, -3) 

(x2,y2,z2)= (0, 2, 3) 

(x3,y3,z3)= (-4, -4, -1)

Length AB = \(\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}\)

Length BC = \(\sqrt{(x_3-x_2)^2+(y_3-y_2)^2+(z_3-z_2)^2}\)

Length AC = \(\sqrt{(x_3-x_1)^2+(y_3-y_1)^2+(z_3-z_1)^2}\)

Here, AB = BC 

∴ vertices A, B, C forms an isosceles triangle.

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