find the value of a if points P(1,5) Q(a,1) R(4,11) are collinear
aalimakhan1262001:
hey can u tell me from which formula i can solve this i mean distance section or area......?
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Just use area of triangle formula
0=1/2(1(1-11)+A(11-5)+4(5-1))
And by solving this you'll get a=-1
0=1/2(1(1-11)+A(11-5)+4(5-1))
And by solving this you'll get a=-1
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