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P = 26 cm
GL = 24 cm
r = 4 cm
maka :
(R-r)² = P² - GL²
(R-4)² = 26² - 24²
(R-4)² = 676 - 576
R-4 = √100
R = 10 + 4
R = 14 cm
jadi panjang jari2 lain = 14 cm