10. 11. 12. 10 15 6 60° 60° 8. 18 10 Areas of Plane Figures / 437 13. 14. 15. 60 60 2 92/45 3 8. 3 30° 6 10 16. An isosceles trapezoid with legs 13 and bases 10 and 20 17. An isosceles trapezoid with legs 10 and bases 10 and 22 18. A trapezoid with bases 8 and 18 and 45° base angles

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