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  1. The area of a triangle formed by y = x, x = 6 and y = 0 is :
    1. 36 sq. units
    2. 18 sq. units
    3. 9 sq. units
    4. 72 sq. units
Correct Option: B


Co-ordinates of point B = (6, 6) as y = x and x = 6
∴ OA = 6 and AB = 6
∴ Area of ∆OAB

=
1
 × OA × AB
2

=
1
 × 6 × 6 = 18 sq. units
2


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