Tolong di jawab no 30

luas lingkaran
=¼×π×d²
=¼×22/7×784
=¼×2464
=616cm²
luas layang-layang
=½×d¹×d²
=½×28×20
=½×560
=280cm²
jadi, 616-280=336cm²

maaf kalo sala