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keliling = 4 x 1/4 2πr + 2x16 + 2x6
= 2x 22/7x7 +32+12
=44 + 32 + 12
= 88 cm
luas = luas persegi panjang - luas sepermpat lingkaran
= (px l)- (4x 1/4πr²)
= (30x20)- (22/7x7²)
= 600-154
= 446 cm²