Ncert exemplar solutions mathematics class 9 Solutions for Chapter 11 constructions

Exercises in Chapter 11 constructions Grade 9

Constructions - Exercise 11.1

Constructions - Exercise 11.2

Constructions - Exercise 11.3

Constructions - Exercise 11.4

Questions in Constructions - Exercise 11.1

Write True or False in the following. Give reasons for your answer:

An angle of 52.5° can be constructed.

Questions in Constructions - Exercise 11.2

Write True or False in the following. Give reasons for your answer:

An angle of 52.5° can be constructed.

Write True or False in each of the following. Give reasons for your answer:

An angle of 42.5° can be constructed.

Write True or False in each of the following. Give reasons for your answer:

A triangle ABC can be constructed in which AB = 5 cm, ∠A = 45° and BC + AC = 5 cm.

Questions in Constructions - Exercise 11.3

Draw an angle of 110° with the help of a protractor and bisect it. Measure each angle.

Draw a line segment AB of 4 cm in length. Draw a line perpendicular to AB through A and B, respectively. Are these lines parallel?

Draw an angle of 80° with the help of a protractor. Then construct angles of

(i) 40°

(ii)160°

(iii) 120°.

Construct a triangle whose sides are 3.6 cm, 3.0 cm and 4.8 cm. Bisect the smallest angle and measure each part.

Questions in Constructions - Exercise 11.4

Construct each of the following and give justification:

A triangle if its perimeter is 10.4 cm and two angles are 45° and 120°.

Construct each of the following and give justification:

A triangle PQR given that QR = 3cm, ∠ PQR = 45° and QP – PR = 2 cm.

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