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4 . 3,14 . r^ = 1256
12,56 . r^ = 1256
r^ = 100
r = 10
jadi panjang jari2 nya 10
LP bola = 1.256 cm^2
• Dit :
r bola?
• Jawab :
LP bola = 4 . phi . r^2
1.256 = 4 . 3,14 . r^2
1.256 = 12,56 . r^2
1.256 / 12,56 = r^2
100 = r^2
r = akar dari 100
r = 10 cm
.
Semoga benar jawabannya dan membantu ya! ;)