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NCERT Books for Class 9 Maths Chapter 11

Last updated date: 17th May 2024
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NCERT Books for Class 9 Maths - Constructions - Free PDF Download

Chapter 11 constructions of Class 9th Math deals with the construction of different types of triangles by using certain types of methods (like construction of triangles with the use of angle bisectors). The chapter might look intimidating but will become very easy once you start to understand the concepts and start to practice a little. Even too much practice is not needed for this chapter of Construction, just complete the whole NCERT book questions and understand the concepts along with the answers.


Free NCERT Books download for Class 9 Math Chapter 11 - Constructions is available on Vedantu. Students can also download the NCERT Book Solutions in PDF for Class 9 Math. Register for Math tuition to clear your doubts and score more in your exams.

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List of Types of Construction Discussed in NCERT Books for Class 9 Math Chapter 11 - Constructions

Chapter 11 of Class 9 is all about construction. The main type of sums on construction discussed in this chapter are written below -   

  • Construction for the bisector of an angle provided.

  • Construction for the perpendicular bisector of a given line segment.

  • Construct the angle of 60 degrees at the initial point to a line segment or a ray

  • Construction of a triangle, if the base length, base angle, and the sum of other two sides are provided.

  • Construction of a triangle when the base, base angle, and the difference of other two sides are available. 

  • Construction of a triangle, if the perimeter of that triangle and its two bases are given.

FAQs on NCERT Books for Class 9 Maths Chapter 11

1. How many questions are there in NCERT Books Free Download for Class 9 Math Chapter 11 - Constructions?

There are only 10 questions in Chapter 11 construction of Class 9 Math. These 10 questions are divided into two exercises, exercise 11.1 and exercise 11.2, each exercise has 5 questions included in them. All the 10 questions are very important for Class 9 examinations. Solutions of all the questions in the NCERT book for Class 9 Math Chapter 11 - Construction is provided by the Vedantu for students to easily get through their examinations. But students should try to first try to solve these questions by themselves before referring to the solutions provided.

2. Which geometrical instruments will be required by the student for the Chapter 11 Construction of Class 9 Math?

To draw construction in this chapter, the student will be required to have a certain set of geometrical instruments in their geometry box. The geometrical Instruments a student will need are -

  1. A standard scale: The scale should have one side marked with centimeters and millimeters, and the second side marked with inches are standard scales. A standard scale will be used for making straight lines.

  2. Protector: Protectors are used in measuring and marking certain angles.

  3. Compass: needed for drawing circles, arcs and angles.

  4. A set of dividers or a single divider to measure lengths.

  5. A pair of set squares

3. How to Download the Solution to the NCERT Books Free Download for Class 9 Math Chapter 11 - Constructions?

To download the students need to visit the website of Vedantu, where they will be able to find the download links to the PDF solution of the questions of NCERT book of Class 9 Chapter 11. Students have to enter their Email ID in order to get the PDF file of the solutions. The required file will be sent to the entered email ID, in a few minutes. But if the student had already created an account with Vedantu, then the PDF will be sent to their e-mail with one click.

4. What type of questions are there on the construction of a triangle from NCERT Books for Class 9 Math Chapter 11 - Constructions?

To construct a triangle using the methods mentioned in Chapter 11 of Class 9 Math, at least three parts of the triangle will be needed. But not just any three parts, the proper combination of three parts will be required. The questions for the construction of the triangle in Chapter 11 provide the student with the combination.

Questions in this chapter will be like, Construction of triangle when -  

  • Base length, base angle and sum of the other two sides are provided.

  • Base length, one base angle and the difference of the other two sides are given

  • The perimeter of the circle and two base angles are given.

Students can also download NCERT Solutions for Class 9 Science created by the best Teachers at Vedantu for Free.