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Luas Juring
=¼ πr²
=¼ . 3,14. 20²
=314 cm²
Luas 1 segitiga
=½at
=½×20×20
=10×20
=200 cm²
Luas sisi kanan taplak bentuk lingkaran
=L juring - L segitiga
=314-200
=114 cm²
Luas taplak meja
=4 Luas segitiga + 2 sisi lingkaran
=4×200 + 2×114
=800 + 228
=1028 cm²