CBSE  /  Class 9  /  Maths  /  Constructions

  • 1. 
    With the help of a ruler and compasses which of the following is not possible to construct?

  • 120°
  • 135°
  • 140°

  • 2. 
    If the construction of a triangle ABC in which AB = 6 cm, ∠A = 70° and ∠B = 40° is possible then find the measure of ∠c.

  • 40°
  • 70°
  • 80°

  • 3. 
    Which of the following set of lengths can be the sides of a triangle?

  • 2 cm, 4 cm, 1.9 cm
  • 5.5 cm, 6.5 cm, 8.9 cm
  • 1.6 cm, 3.7 cm. 5.3 cm

  • 4. 
    The construction of a triangle ΔABC in which BC = 6 cm, ∠A = 50° is not possible, when difference of BC and AC is equal to

  • 4.6 cm
  • 6.4 cm
  • 5.1 cm

  • 5. 
    Which of the following angle can be constructed with the help of a ruler and a pair of compasses?

  • 35°
  • 40°
  • 37.5°
  • 47.5°

  • 6. 
    To construct an angle of 60 degrees, we need to draw first:

  • A ray
  • An arc
  • Two rays
  • A straight line

  • 7. 
    The side lengths 4 cm, 4 cm and 4 cm can be sides of:

  • Scalene Triangle
  • Isosceles Triangle
  • Equilateral Triangle
  • None of the above

  • 8. 
    If a, b and c are the lengths of three sides of a triangle, then:

  • a + b > c
  • a - b > c
  • a + b = c
  • a - b = c

  • 9. 
    Which of these angles we cannot construct it using ruler and compasses?

  • 120
  • 70
  • 60
  • All can be constructed

  • 10. 
    Which of the following angles can be constructed using ruler and compass?

  • 35
  • 40
  • 90
  • 50
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