Answer :
Given:
x + y − 6 = 0 … (1)
x − 3y − 2 = 0 … (2)
5x − 3y + 2 = 0 … (3)
Assuming:
In triangle ABC, let equations (1), (2) and (3) represent the sides AB, BC and CA, respectively.
Concept Used:
Point of intersection of two lines.
Explanation:
Solving (1) and (2):
x = 5, y = 1
Thus, AB and BC intersect at B (5, 1).
Solving (1) and (3):
x = 2, y = 4
Thus, AB and CA intersect at A (2, 4).
Similarly, solving (2) and (3):
x = −1, y = −1
Thus, BC and CA intersect at C (−1, −1).
∴ Area of triangle ABC =
Hence, area of triangle ABC is .
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