Jawabanmu

2014-03-18T20:56:57+07:00
Luas Juring = sudut\360 x Luas Lingkaran
= 72 \360 x 22/7 x 14 x 14
= 1/5 x 616
= 123,2 cm2
2014-03-18T20:57:02+07:00
R = 1/2 d = 1/2 × 28 = 14 cm
Luas juring = 72/360 ×  \pi  × r × r
= 1/5 × 22/7 × 14 × 14
= 123,2 cm²