Q2Long answerExercise 6.3
x − 1 2 x + 2 3x So, = = 18 3x + 9 6 x 2 x − 1 3x Now, taking = , we have 18 6x 2x −1 1 = 18 2 or 4 x – 2 = 18 or x=5 Therefore, AB = 2 × 5 –1= 9, BC = 2 × 5 + 2 = 12, CA = 3 × 5 = 15, DE = 18, EF = 3× 5 + 9 = 24 and FD = 6 × 5 = 30 Hence, AB = 9 cm, BC = 12 cm, CA = 15 cm, DE = 18 cm, EF = 24 cm and FD = 30 cm. TRIANGLES 73
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x=2 4. 9:1 6. 4 3 cm 7. 18 cm 1:3 60 cm 108 cm 12 cm 8. 9. 10. 2 12. 13. cm 14. 10 m 15. 8m