Question

4 19 cm 20 cm 15 cm

Explanation:

Step1: Recall the trapezoid area formula

The area formula of a trapezoid is \(A=\frac{(a + b)h}{2}\), where \(a\) and \(b\) are the lengths of the parallel sides, and \(h\) is the height.

Step2: Identify the values of \(a\), \(b\), and \(h\)

Here, \(a = 19\space cm\), \(b=15\space cm\), and \(h = 20\space cm\).

Step3: Substitute the values into the formula

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Answer:

\(340\space cm^{2}\)