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d = 20 cm
maka
s² = d² - (R - r)²
= 20² - (10 - 4)²
= 20² - 6²
= 400 - 36
= 364
s = √364
s = √4 · √91
s = 2√91 cm
Terimakasih semoga membantu
Jarak kedua pusat lingkaran 20 cm
Dit: Garis singgung luar=...?
Jwb:
GL² = P² - (R-r)²
GL² = 20² - (10-4)²
GL² = 400 - (6)²
GL² = 400 - 36
GL² = 364
GL = √364
GL = 19,1 cm