NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 9: Symmetry and Practical Geometry - Multiple Choice Questions
Question 10

Question.  10

Number of set squares in the geometry box is

(A)

0

(B)

1

(C)

2

(D)

3

Detailed Answer with Explanation:

  1. What is a set square?
    It is a small triangle-shaped plastic tool used for drawing straight lines and measuring angles in geometry.
  2. How many types are in a standard box?
    A regular school geometry box has two different set squares.
  3. Set square 1 (Isosceles right triangle):
    Angles are 45°, 45°, and 90°.
    You use it when you need a 45° angle or a right angle.
  4. Set square 2 (Scalene right triangle):
    Angles are 30°, 60°, and 90°.
    You use it when you need a 30° or 60° angle or a right angle.
  5. Conclusion:
    Since a standard geometry box has both of these triangles, the number of set squares is 2.
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