Mencari luas daerah berbayang
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πr²
22/7×10,5×10,5=346,5 dm²
L arsir=441-346,5=94,5 dm²
9. 22/7×10,5×10,5=346,5 cm²
3,14×5×5=268 cm²
L arsir=346,5-268=78,5 cm²
10. pnjg=17cm
lebar=14 cm
L p.pnjg=17×14=238 cm²
L ling=1/2×22/7×7×7=77 cm²
L arsir=238+77=315 cm²
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