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10 x 7 = 70 cm2
1/2 lingkaran = 1/2 x 22/7 x 3,5 x 3,5
1/2 x 22/2 x 3,5 = 19,25
70 + (19,25 x 3) = 70 + 57,75 = 127,75
luas lingkaran = x 3,5 x 3,5 = 38,5 cm²
luas 1/2 lingkaran = 38,5 / 2 = 19,25 cm²
jadi, luas seluruh bangun = 70 + 38,5 + 19,25 = 127,75 cm²
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