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The diagonal of a rectangle is 12 cm and it makes an angle 35° With one side. Find the perimeter of the rectangle. [sin 35° = 0.57, cos 35° = 0.82] |
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Answer» Let the breadth of the rectangle = x and length = y sin 35° = \(\frac{x}{12}\) x = 12 × sin 35 = 12 × 0.57 = 6.84 cm. cos 35° = \(\frac{y}{12}\) y = 12 × cos 35 = 12 × 0.82 = 9.84 cm. Perimeter = 2(6.84 + 9.84) = 2 × 16.68 = 33.36 cm |
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