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Two statements are given: Statement I: In \(\triangle A B C, A B=6 \sqrt{3} \mathrm{~cm}, A C=12 \mathrm{~cm}\) and \(B C=6 \mathrm{~cm}\), then angle \(B=90^{\circ}\) Statement II: \(\triangle A B…

Question and options

Two statements are given:

Statement I: In △ABC,AB=63 cm,AC=12 cm\triangle A B C, A B=6 \sqrt{3} \mathrm{~cm}, A C=12 \mathrm{~cm} and BC=6 cmB C=6 \mathrm{~cm}, then angle B=90∘B=90^{\circ}

Statement II: △ABC\triangle A B C is isosceles with AC=BCA C=B C. If AB2=2AC2A B^{2}=2 AC^{2}, Then angle C=90∘C=90^{\circ}

In the light of the given statements, choose the correct answer from the given options:
  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true

Answer and explanation

Correct answer: A - Both Statement I and Statement II are true
I: AB^2 + BC^2 = 108 + 36 = 144 = AC^2, so angle B = 90 deg (true). II: AB^2 = 2AC^2 = AC^2 + BC^2, so angle C = 90 deg (true).

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