Show that the points A(-1, 1), B(5, 7) and C(8, 10) are collinear.
Answers
Answered by
5
Answer:
They are collinear
Step-by-step explanation:
Let the points not be collinear.
So they make a triangle.
ar of triangle ABC =
1/2[-1(7-10)+5(10-1)+8(1-7)]
1/2[3+45-48]
1/2[48-48]
1/2×0
0
ar of triangle ABC=0
This is only possible if the points lie on the same line.
Therefore A,B,C are collinear
Answered by
1
Answer:
Step-by-step explanation:
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