Class 9 NCERT Solutions- Chapter 11 Constructions – Exercise 11.2 Last Updated : 28 Dec, 2020 Improve Improve Like Article Like Save Share Report Question 1. Construct a ∆ ABC in which BC = 7 cm, ∠B = 75° and AB + AC = 13 cm. Solution: Steps of construction: Draw a line segment BC base of cm is drawn. At point B draw an angle of 75°. Cut BD =13cm from BY. Join ∠D which intersect BD at A. Join AC. Now triangle ABC is the required triangle Question 2. Construct a ABC in which BC = 8 cm, ∠B = 45° and AB – AC = 35 cm. Solution: Steps of construction: Draw a line segment BC=8cm. At point B, draw angle 45°. Cut BD=3.5 from BY. Join CD. Draw perpendicular bisector of CD, which construct BY at A. Join AC. NOW, ABC is the required triangle. Question 3. Construct a ∆ ABC in which QR = 6 cm, ∠Q = 60° and PR – PQ = 2 cm. Solution: Steps of construction: Draw a line segment QR=6cm. At point Q draw angle 60°. Extend PQ to Y’. Cut QS =2cm from QY’. Join RS. Draw perpendicular bisector of RS which intersect QY at P. Join PR. Now, PQR is the required triangle. Question 4. Construct a ∆ XYZ in which ∠Y = 30°, ∠Y = 90° and XY + YZ + ZX = 11 cm. Solution: Steps of construction: Draw a line segment AB=11cm. At point A draw ∠BAP=30°. At point B draw angle 90°. Draw the bisector of ∠BAP and ∠ABR which intersect each other at X. Join AX and BX. Draw perpendicular bisector of AX and BX which intersect AB on Y and Z respectively. Join XY and XZ. Then XYZ is the required triangle. Question 5. Construct a right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm. Solution: Steps of construction: Draw a line segment of BC=12cm. At point B draw angle b=90° Cut BD =18cm. Join CD. Draw perpendicular bisector of CD which intersect BD at point A. Join AC. Now ABC is the required triangle. Like Article Suggest improvement Previous Class 9 NCERT Solutions- Chapter 11 Constructions - Exercise 11.1 Next Class 9 NCERT Solutions- Chapter 12 Heron's Formula - Exercise 12.1 Share your thoughts in the comments Add Your Comment Please Login to comment...