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= (1/2 . .r.r) - (1/2 . .r.r)
= (1/2 . 22/7. 14.14) - (1/2 . 22/7 .7.7)
= 308 cm² - 77 cm²
= 231 cm²
B. L = L 1/4 lingk - Lsegitiga
= (1/4. . 14.14) - (a.t:2)
= (1/4.22/7.14.14) - (14.14:2)
= 154 cm² - 98 cm²
= 56 cm²