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प्रश्न
Find the value of x if ∠A = 32°, ∠B = 55° and obtuse angle AED = 115°.
बेरीज
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उत्तर
In the figure, ∠A = 32, ∠B = 55°
∠AED =115°
In ∆ABC
Exterior ∠ACD = ∠A + ∠B = 32° + 55° = 87°
Similarly in ∆CDE
External ∠AED = ∠D + ∠ACD
⇒ 115° = x + 87° ⇒ x = 115°- 87° = 28°
Hence x = 28°
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