If $A$ and $B$ are two points on the line $3x + 4y + 15 = 0$ such that $OA = OB = 9$ units, then the area of the triangle $OAB$ is
If $A$ and $B$ are two points on the line $3x + 4y + 15 = 0$ such that $OA = OB = 9$ units, then the area of the triangle $OAB$ is
- A
$18 sq.$ units
- B
$18\sqrt 2 sq.$units
- C
18/$\sqrt 2 sq.$ units
- D
None of these
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