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(4x6):2= 12
luas lingk:
22/7 x 7 x 7 = 154
luas seluruh: 154+12=166
20. luas 1/2 lingk. I:
1/2 x 22/7 x 7 x 7 = 77
luas 1/2 lingk. II:
1/2 x 22/7 x 7 x 7 = 77
luas persegi:
(14 x 14) - (1/2 x 22/7 x 7 x 7) = 119
luas seluruhnya:
119 + 77 + 77 = 273 cm²