मराठी

In ΔABC, AB = 6sqrt(3) cm, AC = 12 cm and BC = 6 cm. Then, ∠B is ______.

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प्रश्न

In ΔABC, AB = `6sqrt(3)` cm, AC = 12 cm and BC = 6 cm. Then, ∠B is ______.

पर्याय

  • 45°

  • 60°

  • 90°

  • 120°

MCQ
रिकाम्या जागा भरा
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उत्तर

In ΔABC, AB = `6sqrt(3)` cm, AC = 12 cm and BC = 6 cm. Then, ∠B is 90°.

Explanation:

In ΔABC, AC is the longest side.

`AB^2 + BC^2 = {(6sqrt(3))^2 + 6^2} cm^2`

= (108 + 36) cm2

= 144 cm2

= (12 cm)2

= AC2

∴ By the converse of Pythagoras' theorem, we have ∠B = 90°.

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पाठ 7: Triangles - MULTIPLE-CHOICE QUESTIONS (MCQ) [पृष्ठ ४५४]

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आर. एस. अग्रवाल Mathematics [English] Class 10
पाठ 7 Triangles
MULTIPLE-CHOICE QUESTIONS (MCQ) | Q 33. | पृष्ठ ४५४
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