CBSE Class 10: Videos

A, B and C are correct.

If the area of the triangle joining a set of points is equal to zero, then the given set of points is collinear.

According to the question, x₁ (y₂ - y₃) + x₂ (y₃ - y₁) + x₃ (y₁ - y₂) = 0∴ 1(0 - b) + 0 (b - 2) + a(2 - 0) = 0∴ -b + 2a = 0∴ 2a = b