Step-by-step explanation:
Length of bases of trapezoid are:
7 + 3 + 7 = 17 units & 3 units
Height h = 8 units
[tex]area \: of \: trapezoid \\ = \frac{1}{2} (sum \: of \: length \: of \: bases) \\\times height \\ \\ = \frac{1}{2} \times (17 + 3) \times 8 \\ \\ = \frac{1}{2} \times 20 \times 8 \\ \\ = 10 \times 8 \\ \\ = 80 \: {units}^{2} \\ [/tex]
