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Verified answer
Diketahui↪d = 15 cm
↪GD = 12 cm
↪R = 6 cm
Ditanya
↪r =....?
Jawaban
(R + r) ² = d² - GL²
(6 + r) ² = 15² - 12²
(6 + r) ² = 225 - 144
(6 + r) ² = 81
6 + r = √81
6 + r = 9
r = 9 - 6
r = 3 cm
Jadi, jari jari lainnya adalah 3 cm✔