Find the area of the shaded triangle.
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Step-by-step explanation:
Area of shaded portion = area of square - [ sum of areas of three unshaded triangles]
=> 20×20 [ 1/2×10×20 + 1/2×10×10 + 1/2 × 10 × 20 ]
=> 400 - [ 100 + 50 + 100 ]
=> 400 - 250
=> 150 cm²
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