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Question

The area of the ∆OAB with O(0, 0), A(4, 0) and B(0, 6) is
(a) 8 sq units
(b) 12 sq units

(c) 16 sq units
(d) 24 sq units

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Solution



(b) 12 sq units
Explanation:
On plotting the points on a graph paper, we get ∆OAB as a right angle triangle, where OA = base = 4 units and OB = 6 units
∴ Area of ∆OAB = ½ × OA × OB = ½ × 4 × 6 = 12 sq units

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