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CTET 8 Feb 2026 Paper 1, Question 35

Topic: Geometry

Q35

Which of the following statements is not correct ?

  1. (1) One acute angle and one obtuse angle can be put together to make a straight angle.
  2. (2) Reflex angle is greater than 180° but less than 360°.
  3. (3) Two acute angles can be put together to make a reflex angle.Correct answer
  4. (4) Two acute angles can be put together to make an obtuse angle.

Solution.

CBSE answer: (3)

Answer: (3) Two acute angles can make a reflex angle

  1. Each acute angle is less than 90∘90^\circ, so two together are less than 180∘180^\circ.
  2. A reflex angle is more than 180∘180^\circ, so this statement is false.
  3. (1) is true: 60∘+120∘=180∘60^\circ + 120^\circ = 180^\circ. (4) is true: 60∘+50∘=110∘60^\circ + 50^\circ = 110^\circ, obtuse.
  4. (2) is the correct definition of a reflex angle.