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

Question 17

Question 17: The instrument in the geometry box having the shape of a triangle is called a ____.

Step-by-step explanation (very simple):

1. Look at the shapes of common tools in a geometry box.

   • Protractor: A half-circle or full circle used to measure angles (like 180° or 360°). Not a triangle.
   • Compasses: Two legs with a pencil on one side, used to draw circles. Not a triangle.
   • Divider: Two sharp metal legs used to measure distances on paper. Not a triangle.
   • Set-square: A flat plastic triangle with a right angle. It usually comes in two types:
     • 45°–45°–90° triangle
     • 30°–60°–90° triangle

2. Match the question with the correct tool.

   The question asks for the tool that is shaped like a triangle. That is the set-square.

3. Therefore, the correct answer is: D) Set-square.

Final Answer:

D) Set-square