How many more parts must be shaded to make the figure

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How many more parts must be shaded to make the figure<br><img src='https://www.fatskills.com/images3/class3olympiad/image01040.jpeg'' />shaded?<br><img src='https://www.fatskills.com/images3/class3olympiad/image01041.jpeg' width='400px'>(NSTSE'14)