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luas 2buah 1/4lingkaran diujung persegi panjang = 1/2 ingkaran
= πr² 1/2
= 22/7 x 7x7 x1/2
=154 x 1/2
= 77cm²
Lpersgipanjang - L1/2lingkaran = 210cm² - 77cm² = 133cm²
jadi, luas yang di arsir adalah 133cm²