Question

Detemine whether the sets of points are collinear ? 

(i) (-1/2,3), (-5,6) and (-8,8)

(iii) (a,b + c), (b,c + a) and (c,a + b)

Answer 1

(i) (-1/2,3), (-5,6) and (-8,8)

= (1/2)[-67 + 67] = 0 sq. units

∴ The given points are collinear.

(iii) (a,b + c), (b,c + a) and (c,a + b)

∴ The given points are collinear