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= 1/2 × 22/7 × 7²
= 1/2 ×154 cm
= 77 cm
L persegi panjang = p×l
= (8+14)× 14
= 22 × 14
= 308
L darerah diarsir = 308 cm- 77cm
= 231cm
jawabannya yang B
= 14 × (14+8)
= 308cm
Luas setengah lingkaran = ×π×r²
= ×22/7×7×7
= 77cm
Luas daerah yang diarsir = luas persegi panjang-luas set lingkaran
= 308 - 77
= 231cm² B