Penjelasan dengan langkah-langkah:
d² = p² - (R + r)²
(20 cm)² = p² - (9 cm + 6 cm)²
400 cm² = p² - (15 cm)²
400 cm² = p² - 225 cm²
p² = 400 cm² + 225 cm²
p² = 625 cm²
p = ✓625
p = 25 cm
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Penjelasan dengan langkah-langkah:
d² = p² - (R + r)²
(20 cm)² = p² - (9 cm + 6 cm)²
400 cm² = p² - (15 cm)²
400 cm² = p² - 225 cm²
p² = 400 cm² + 225 cm²
p² = 625 cm²
p = ✓625
p = 25 cm