S = 49 cm2, a = 7 cm, S = 400 cm2, a = 20 cm, S = 96 cm2, a = 8 cm b = 12 cm, S = 36 cm2, a = 6 cm, S = 150 cm2, a = 15 cm b = 10 cm, S = 60 cm2, a = 5 cm b = 12 cm, S = 100 cm2, a = 10 cm, S = 45 cm2, a = 9 cm b = 5 cm.

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