IDNStudy.com, ang iyong mapagkukunan para sa malinaw at mabilis na mga sagot. Ang aming komunidad ay narito upang magbigay ng detalyadong sagot sa lahat ng iyong mga katanungan.

Three circles are tangent externally. The distance between their centers are 23,25 and 20 inches find their radii

Sagot :

Let the diameter of each circle be a,b and c

1/2 a + 1/2 b= 23  can be a+b=46.....E1
1/2 a + 1/2 c= 25  can be a+c=50......E2
1/2 b + 1/2 c=20  can be b+c=40......E3 (Let E mean equation cause its confusing)

E1+E2-E3=2a
96-40=2a
56=2a
28=a

From this we can get b=18 and c=22

So their radii are 14,9 and 11