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  1. Chapter 11 Class 9 Constructions
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Ex 11.2, 1 Construct a triangle ABC in which BC = 7 cm, B = 75 and AB + AC = 13 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. 4.Let PQ intersect BD a point A. Join AC. Then, ABC is the required triangle.

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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.