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R = 12 cm
r = 2 cm
GL = 24 cm
dit : P ?
maka :
P² = GL² + (R-r)²
P² = 24² + (12-2)²
P² = 567 + 100
P = √676
P = 26 cm
jadi jrak titik pusat = 26 cm
s= garis singgung luar = 24
R = jari-jari lingkaran besar = 12
r = jari-jari lingkaran kecil = 2
d² = s² + (R-r)²
d² = 24² + (12-2)²
d² = 576 + 100 = 676
d = √676 = 26 cm