If 3 given points are collinear, then the area of the triangle is zero. For P(x1, y1), Q(x2, y2) and R(x3, y3), the area of the triangle is So, 1/2 X [x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2)] = 0 For the given set of points, area of the triangle = (1/2) X [2(a - 7) + 5(7 - 3) + 6(3 - a)] = 0 Or, (1/2) X [2a - 14 + 20 + 18 - 6a] = 0 Or, (1/2) X (24 - 4a) = 12 - 2a = 0 So, 2a = 12 And a = (12/2) = 6
If all the five persons are made to stand in a line according to their age, first in ascending order, then in descending order, then whose position will...
Who among the following sits second to the right of company Tata?
Answer the questions based on the information given below.
Six persons R, S, T, U, V, and W lives in a six- building floor such that the botto...
Who among the following manufacture Oil?
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Who among the following likes Linc?
Four of the following five are alike in a certain way based on the given arrangement and thus form a group. Which is the one that does not belong to tha...
As many people live above E is same as that of below___?
Who lives immediately above O?
