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Lebar persegi panjang = 5 + 7 = 12 cm
Luas daerah diarsir = luas persegi panjang - 1/2 luas lingkaran
= 20 x 12 - 1/2 x 22/7 x 7 x 7
= 240 - 77
= 163 cm^2
LL= 1/2.22/7.7.7
L yang di arsir = LPP-LL
=240-77
=163