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31.) 60/360 × 2 × 22/7 × 42 = 44cm
=
5x = 6
x = 1,2
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔
31. r = 42
kll= 2 x x 42 = 264 cm
maka panjang busur = 60°/360° x 264 = 44 cm