Question 43Asked in CTET February 2026 Paper 2 Maths & Science, 7 Feb 2026

Which of the following measurements (in cm) cannot form the sides of a right triangle?निम्न मापनों (cm में) में से किनसे एक समकोण त्रिभुज की भुजाएँ नहीं बन सकती हैं?

निम्न मापनों (cm में) में से किनसे एक समकोण त्रिभुज की भुजाएँ नहीं बन सकती हैं?
  1. A2.5, 6.5, 62.5, 6.5, 6
  2. B12, 16, 2012, 16, 20
  3. C4.5, 6, 7.54.5, 6, 7.5
  4. D8, 16, 128, 16, 12
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Correct answer: (D) 8, 16, 128, 16, 12

Explanation

Check the Pythagoras relation: 2.5² + 6² = 42.25 = 6.5²; 12² + 16² = 400 = 20²; 4.5² + 6² = 56.25 = 7.5²; but 8² + 12² = 208 ≠ 16² = 256, so 8, 16, 12 cannot form a right triangle.पाइथागोरस संबंध जाँचिए: 2.5² + 6² = 42.25 = 6.5²; 12² + 16² = 400 = 20²; 4.5² + 6² = 56.25 = 7.5²; पर 8² + 12² = 208 ≠ 16² = 256, इसलिए 8, 16, 12 से समकोण त्रिभुज नहीं बन सकता।

From CTET February 2026 Paper 2 Maths & Science, 7 Feb 2026 — Previous Year Paper

This is question 43 of CTET February 2026 Paper 2 Maths & Science, 7 Feb 2026 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.