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d: 10 x 2
: 20 cm
1. ditanya: pb (pnjg busur) sdt 45?
jwb:
=45/360 x 20 cm
= 1/8 x 20 cm
= 5/4 cm
= 1,25 cm
2. dit: pb sdt 30?
= 30/360 x 20 cm
= 1/12 x 20 cm
= 5/3 cm
= 1 2/3 cm