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# NCERT solutions for Class 9 Mathematics chapter 11 - Constructions

## Chapter 11: Constructions

Ex. 11.10Ex. 11.20

#### Chapter 11: Constructions Exercise 11.10 solutions [Page 191]

Ex. 11.10 | Q 1 | Page 191

Construct an angle of 90° at the initial point of a given ray and justify the construction.

Ex. 11.10 | Q 2 | Page 191

Construct an angle of 45° at the initial point of a given ray and justify the construction.

Ex. 11.10 | Q 3.1 | Page 191

Construct the angles of the following measurement:- 30°

Ex. 11.10 | Q 3.2 | Page 191

Construct the angles of the following measurement:- 22 1/2^@

Ex. 11.10 | Q 3.3 | Page 191

Construct the angles of the following measurement:- 15°

Ex. 11.10 | Q 4.1 | Page 191

Construct the 75° angles and verify by measuring it by a protractor.

Ex. 11.10 | Q 4.2 | Page 191

Construct the 105° angles and verify by measuring it by a protractor.

Ex. 11.10 | Q 4.3 | Page 191

Construct the 135° angles and verify by measuring it by a protractor.

Ex. 11.10 | Q 5 | Page 191

Construct an equilateral triangle, given its side and justify the construction.

#### Chapter 11: Constructions Exercise 11.20 solutions [Page 195]

Ex. 11.20 | Q 1 | Page 195

Construct a triangle ABC in which BC = 7 cm, ∠B = 75° and AB + AC = 13 cm.

Ex. 11.20 | Q 2 | Page 195

Construct a triangle ABC in which BC = 8 cm, ∠B = 45° and AB − AC = 3.5 cm.

Ex. 11.20 | Q 3 | Page 195

Construct a triangle PQR in which QR = 6 cm, ∠Q = 60° and PR − PQ = 2 cm

Ex. 11.20 | Q 4 | Page 195

Construct a triangle XYZ in which ∠Y = 30°, ∠Z = 90° and XY + YZ + ZX = 11 cm.

Ex. 11.20 | Q 5 | Page 195

Construct a right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm.

## Chapter 11: Constructions

Ex. 11.10Ex. 11.20

## NCERT solutions for Class 9 Mathematics chapter 11 - Constructions

NCERT solutions for Class 9 Maths chapter 11 (Constructions) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Mathematics Class 9 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9 Mathematics chapter 11 Constructions are Introduction of Constructions, Basic Constructions, Some Constructions of Triangles.

Using NCERT Class 9 solutions Constructions exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 9 prefer NCERT Textbook Solutions to score more in exam.

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