CBSE  /  Class 9  /  Maths  /  Constructions

  • 1. 
    If a, b and c are the lengths of the three sides of a triangle, then which of the following is true?

  • a + b < c
  • a - b < c
  • a + b = c

  • 2. 
    With the help of a ruler and compasses, which of the following is not possible to construct?

  • 70°
  • 60°
  • 135°

  • 3. 
    Which of the following sets of angles can be the angles of a triangle?

  • 30°, 60°, 80°
  • 40°, 60°, 70°
  • 50°, 30°, 100°

  • 4. 
    The construction of the triangle ABC is possible if it is given that BC = 4 cm, ∠C = 60° and the difference of AB and AC is

  • 3.5 cm
  • 4.5 cm
  • 3 cm
  • 2.5 cm

  • 5. 
    Which of the following can be the length of BC required to construct the triangle ABC such that AC = 7.4 cm and AB = 5 cm?

  • 3.5 cm
  • 2.1 cm
  • 4.7 cm

  • 6. 
    If we want to construct a triangle, given its perimeter, then we need to know:

  • Sum of two sides of triangle
  • Difference between two sides of triangle
  • One base angles
  • Two base angles

  • 7. 
    To construct a bisector of a given angle, we need:

  • A ruler
  • A compass
  • A protractor
  • Both ruler and compass

  • 8. 
    Which of the following set of lengths can be the sides of a triangle?

  • 2 cm, 4 cm, 1.9 cm
  • 1.6 cm, 3.7 cm, 5.3 cm
  • 5.5 cm, 6.5 cm, 8.9 cm
  • None of the above

  • 9. 
    Which of these angles cannot be constructed using ruler and compasses?

  • 120
  • 60
  • 140
  • 135

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

  • 35
  • 45
  • 95
  • 55
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