1. Chapter 11 Class 9 Constructions
  2. Serial order wise
Ask Download


Construct a Right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm. Let triangle be Δ ABC Given base BC = 12 cm, ∠ B = 90° and AB + BC = 18 cm. Steps of construction Draw base BC = 7 cm and at point B make an ∠ XBC = ∠ B = 75° Cut a line segment BD equal to AB + AC from ray BX. Join DC. Draw perpendicular bisector PQ of line DC. Let PQ intersect BD a point A. Join AC. Then, Δ ABC is the required triangle.

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.