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Verified answer
L 1/4 lingkaran = 1/4 x πr²=1/4 x 22/7 x 28²
=1/4 x 22/7 x 784
=196x 22/7
=616 cm²
L segitiga =1/2at
=1/2x28x28
=14 x 28
=392 cm²
luas arsir =616 -392
=224 cm²