Jawabanmu

2014-05-06T13:01:52+07:00
60/360 x 22/7 x 21 x 21
1/6 x 22 x 3 x 21
1/6 x 1386
=231
2014-05-06T13:02:21+07:00
Ko=2.22/7.21
ko=2.22.3
ko=132cm^2

panjang busur=60/360.132
=1/6.132
=22 cm^2

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