Jawaban:
r = 8 cm
Penjelasan dengan langkah-langkah:
panjang garis singgung(d) = 20 cm
jarak kedua pusat (p) = 25 cm
R = 7 cm
d^2 = p^2 - (R + r)^2
(20)^2 = (25)^2 - (7 + r)^2
400 = 625 - (7 + r)^2
(7 + r)^2 = 625 - 400
(7 + r)^2 = 225
(7 + r)^2 = 15^2
7 + r = 15
r = 15 - 7
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Jawaban:
r = 8 cm
Penjelasan dengan langkah-langkah:
panjang garis singgung(d) = 20 cm
jarak kedua pusat (p) = 25 cm
R = 7 cm
d^2 = p^2 - (R + r)^2
(20)^2 = (25)^2 - (7 + r)^2
400 = 625 - (7 + r)^2
(7 + r)^2 = 625 - 400
(7 + r)^2 = 225
(7 + r)^2 = 15^2
7 + r = 15
r = 15 - 7
r = 8 cm