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Calculate the area of Fig. 1.2.

Mathematics

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Answer

27 cm2\text{27 cm}^2

Step-by-step solution

4 steps
  1. Identify the lengths of the parallel sides and the height of the trapezoid.

    The lengths of the parallel sides are a=5a = 5 cm and b=13b = 13 cm.
    The height of the trapezoid is h=3h = 3 cm.

  2. Use the formula for the area of a trapezoid.

    The area AA of a trapezoid is given by the formula:

    A=12(a+b)hA = \frac{1}{2}(a+b)h
  3. Substitute the given values into the formula.

    A=12(5 cm+13 cm)(3 cm)A = \frac{1}{2}(5 \text{ cm} + 13 \text{ cm})(3 \text{ cm})
  4. Calculate the area.

    A=12(18 cm)(3 cm)A = \frac{1}{2}(18 \text{ cm})(3 \text{ cm}) A=9 cm×3 cmA = 9 \text{ cm} \times 3 \text{ cm} A=27 cm2A = 27 \text{ cm}^2

    The area of Fig. 1.2 is 27 cm2\boxed{\text{27 cm}^2}.

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