Bhgg bajkmanmanajjw flish​

d² = p² – (R + r)²

(R + r)² = p² – d²

(R + r) = √p² – d²

(6 + r) = √15² – 12²

= √225 – 144

= √81

(6 + r) = 9

r = 9 – 6

r = 3 cm

semoga membantu 🙂

Jawaban:

r = 3 cm, semoga membantu 🙂