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Selina Concise Mathematics Class 9 ICSE Solutions Construction of Polygons Selina ICSE Solutions for Class 9 Maths Chapter 15 Construction of Polygons (Using ruler and compass only) Exercise 15 1.Construct a quadrilateral ABCD, when: AB = 3.2 cm, BC = 5.2 cm, CD = 6.2 cm, DA = 4.2 cm and BD = 5.2 cm. Solution 1: 2.Construct a quadrilateral ABCD, when: AB = 7.2 cm, BC = 5.8 cm, CD = 6.3 cm, AD = 4.3 cm and angle A = 75 o . Solution 2: 3.Construct a quadrilateral ABCD, when: Angle A = 90 o , AB = 4.6 cm, BD = 6.4 cm, AC = 6.0 cm and CD = 4.2 cm. Solution 3: 4.Construct a quadrilateral ABCD, when: AB = 3.8 cm, AC = 4.8 cm, AD = 2.8 cm, angle A = 105 o  and angle B = 60 o . Solution 4: 5.Construct a quadrilateral ABCD, when: BC = 7.5 cm AC = 5.8 cm, AD = 3.6 cm, CD = 4.2 cm and angle A = 120 o . Solution 5: 6.Construct a quadrilateral ABCD, when: AD = AB = 4 cm, BC = 2.8 cm, CD = 2.5 cm and angle BAD = 45 o . Solution 6: ...