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luas segitiga=1/2.a.t=1/2.28.28
=392cm²
luas juring=l;uas lingkaran-luas segitiga=2464-392=2072cm²
mohon jadikan jawaban terbaik
= ¼ π r²
= ¼ 22/7. 28 . 28
= 22/7 . 7 . 28
= 22.28
= 616
L segitiga
= ½ a. t
= ½ 28 . 28
= 14 . 28
= 392
L daerah arsir
= 616-392
= 224 cm²