11. Constructions
NCERT
11. Constructions
EXERCISE 11.1
1. Construct an angles of 90° at the initial point of a given ray and justify the construction .
2. Construct an angles of 45° at the initial point of a given ray and justify the construction .
3. Construction the angles of the following measurements :
(i) 30° (ii) 
(iii) 15°
4. Construction the following angles and verify by measuring them by a protractor :
(i) 75° (ii) 105° (iii) 135°
5. Construction an equilateral triangle , given its side and justify the construction .
EXERCISE 11.2
1. Construct a triangle ABC in which BC = 7cm, 
and AB + AC = 13 cm .
2. Construct a triangle ABC in which BC = 8cm, 
and AB – AC = 3.5 cm .
3. Construct a triangle PQR in which QR = 6cm, 
and PR – PQ = 2cm .
4. Construct a triangle XYZ in which ∠Y = 30°, 
and XY + YZ + ZX = 11 cm .
5. Construct a right triangle whose base is 12cm and sum of its hypotenuse and other side is 18 cm .
Posted 3 years ago