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UPSC 1999: If the angles of a triangle are in the ratio of 4 : 3 : 2, then the triangle
(a)is obtuse
(b)has one angle greater than 80°
(c)is a right triangle
(d)is acute
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Not attemptedCorrect Answer: (d) is acute
With ratio 4 : 3 : 2, let each part = 20°. Angles are 80°, 60°, 40°—all < 90°, so the triangle is acute; option (d). The UPSC key gives option D for Q141. ([scribd.com](https://www.scribd.com/document/932458605/Prelims-1999))
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What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (d): is acute. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 141. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.