Question

If A, B, C are points, (–1, 1), (1, 3) and (3, a) respectively and if AB = BC, then fi nd ‘a’.

Answer 1

HELLO USER!!
HERE IS YOUR ANSWER

given that AB = BC
Which means B is the mid point which divided the line in the ratio of 1 : 1
So,

y = (a + 1)/2
3 = (a+1)/2
3 x 2 = a +1
6 -1= a
a = 5

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