English

In a right-angled triangle, hypotenuse is 10 cm, and the ratio of the other two sides is 3 : 4; the sides are ______.

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Question

In a right-angled triangle, hypotenuse is 10 cm, and the ratio of the other two sides is 3 : 4; the sides are ______.

Options

  • 6 cm and 4 cm

  • 8 cm and 6 cm

  • 3 cm and 4 cm

  • 8 cm and 4 cm

MCQ
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Solution

In a right-angled triangle, hypotenuse is 10 cm, and the ratio of the other two sides is 3 : 4; the sides are 8 cm and 6 cm.

Explanation:

Let the other two sides be 3x and 4x. Applying Pythagoras’ theorem, (3x)2 + (4x)2 = 102, which simplifies to 25x2 = 100 or x = 2. Thus, the lengths of the sides are 3(2) = 6 cm and 4(2) = 8 cm.

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Chapter 12: Pythagoras Theorem [Proof and Simple Applications with Converse] - Exercise 12 (A) [Page 178]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 12 Pythagoras Theorem [Proof and Simple Applications with Converse]
Exercise 12 (A) | Q 1. (b) | Page 178
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