Question

Let ABC be a triangle such that AB=(x-1)cm ,AC =2√x,BC=(x+1) then----.a)A=90 (b)B=90(c)C=90 (d)none of these please answee i will mark u brainliest amd be ur best friend​

Answer 1

∠A = 90° if ABC be a triangle such that AB=(x-1)cm ,AC =2√x,BC=(x+1)

Step-by-step explanation:

AB = (x - 1)

BC = (x + 1)

BC > AB

AC = 2√x

AB² + AC² =  (x - 1)² + (2√x )²

= x² + 1 - 2x  + 4x

= x² + 1 + 2x

= (x + 1)²

= BC²

BC² = AB² + AC²

=> BC is hypotenuse

=> Triangle is right angled at A

=> ∠A = 90°

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Answer 2

∠A = 90° if ABC be a triangle such that AB=(x-1)cm ,AC =2√x,BC=(x+1)

Step-by-step explanation:

AB = (x - 1)

BC = (x + 1)

BC > AB

AC = 2√x

AB² + AC² = (x - 1)² + (2√x )²

= x² + 1 - 2x + 4x

= x² + 1 + 2x

= (x + 1)²

= BC²

BC² = AB² + AC²

=> BC is hypotenuse

=> Triangle is right angled at A

=> ∠A = 90°

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