Verified Answer :

vrwarrier
  1. Area of triangle: 1/2bh
    1/2 12 15
    1/2 180
    =90 cm^2

    18. Area of trapezoid: 1/2 h (b1 + b2)
    1/2     8 ( 12 + 15.4)
    4 * 27.4
    = 109.6 cm^2
TheLazyNobita

Step-by-step explanation:

17 ) Area of triangle = 1/2 × base × height

Area = 1/2 × 12 × 15

Area = 90 cm²

18 ) Area of trapezium = 1/2 (12 + 15.4) × 8

Area = 1/2 × 27.4 × 8

Area = 109.6 cm²

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