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Jawab1. luas yang diarsir = 1/5 bagian lingkaran
L = 1/5 . pi. r²
L = 1/5. 22/7. 70. 70 = 3.080
2. luas yangdiarsir = 2/4 bagian persegi panjang
L= 2/4. p. l
L: = 1/2 . 18. 9
L = 9(9)
L= 81