Jawaban:
3.l=2 phi r ( r+t)
=2×22/7×7 [7+10]
=44×17
=748cm²
l=4 phi r²
=4×22/7×7²
=4×22/7×49
=616cm²
luas gabubuang:
=l1+l2
=748+616
=1364cm²
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Jawaban:
3.l=2 phi r ( r+t)
=2×22/7×7 [7+10]
=44×17
=748cm²
l=4 phi r²
=4×22/7×7²
=4×22/7×49
=616cm²
luas gabubuang:
=l1+l2
=748+616
=1364cm²