The area of a triangle formed by the tips of vectors a,b

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The area of a triangle formed by the tips of vectors a,b and c is

1. 1 (a - b).(a - c)
  2
2. 1 |(a - b) × (a - c)|
  2
3. 1 |a × b × c |
  2
4. 1 (a × b).c
  2

Correct Option: B

Let the vectors be
i, j, i + j
(c) (b) (a)

Now Area vector will be perpendicular to place of x, y i.e. z k will be the required unit vector Now, (a), (d) con not give vector product

	1	(a - b).(a - c)
	2

	1	\|(a - b) × (a - c)\|
	2

	1	(a × b).c
	2