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persegi panjang:panjang×lebar
17×14=238
setengah lingkaran:1/2×22/7×jari2×jari2
1/2×22/7×7×7=77
jadi,238+77=315
maaf kalau salah caranya
17×14
238cm
L= 1/2 ×Πr pangkat 2
1/2×22/7×14×14
= 308 dm
= 3080