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  • Show that the points A (–1, 1), B (5, 7) and C (8, 10) are collinear.        

Show that the points A (–1, 1), B (5, 7) and C (8, 10) are collinear.

 

 

 
 
 
 
 

Answers (1)

Points A (–1, 1), B(5, 7) and C(8, 10) are collinear.
if the area of triangle ABC= 0

\\Area\ of\ \Delta ABC=\frac{1}{2}{[(-1) (7-10) +5(10-1) + 8(1-7) ]}\\=0.5[3+45-48]=0

Therefore the given points are collinear
 

Posted by

Safeer PP

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