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Penjelasan dengan langkah-langkah:
Diketahui r = 20 cm
a. panjang busur besar PQ
288/360×2πr
= 288/360×2×3,14×20
= 100,48 cm
b. luas juring besar POQ
288/360×πr²
= 288/360×3,14×20²
= 1004,8 cm²