हिंदी

In the given figure. DE || BC. If AD = x, DB = x – 2, AE = x + 2 and EC = x – 1, then find the value of x.

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प्रश्न

In the given figure. DE || BC. If AD = x, DB = x – 2, AE = x + 2 and EC = x – 1, then find the value of x.

विकल्प

  • 3

  • 4

  • 5

  • 2

MCQ
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उत्तर

4

Explanation:


As, DE || BC,

∴ ΔADE ≈ ΔABC

⇒ `(AD)/(AE) = (AB)/(AC)`

⇒ `x/(x + 2) = (2x - 2)/(2x + 1)`

⇒ `2x^2 + x = 2x^2 + 4x - 2x - 4`

⇒ `2x^2 + x - 2x^2 - 4x + 2x = - 4`

⇒ `3x - 4x = - 4`

⇒ `- x = - 4`

⇒ `x` = 4

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Geometry (Entrance Exam)
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