Ncert mathematics solutions class 9 Solutions for Chapter 11 constructions

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

Construct the following angles and verify by measuring them by a protractor:

(i) 75°

(ii) 105°

(iii) 135°

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

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

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

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