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= 22/7 x 10,5x 10,5
=346,5 cm²
Luas 1/4 lingkaran = 346,5cm² /4
= 86,625 cm²
luas segitiga = 1/2 Alas x tinggi
= 1/2 x 10,5 x 10,5
= 55,125cm²
Luas diaksir = luas 1/4lingkaran - Luas segitiga
= 86,625 - 55,125
= 31,5 cm²