two circles touch each other internally then between their centres is 5cm, if they touch externally then the distance between their centres is 25. Find the radii of the circles.
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Answer:
Answer. Answer: Distance between their centres is 25 cm or 5 cm . By theorem of touching circles, the centres and point of contact are collinear
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Step-by-step explanation:
Let a be the radiud of the first circle
and b be the radius of the second
so, when the two touch internally,
a-b= 5(I)
and when they touch externally,
a+b=25(ii)
so solving the two we get
a=15 and b=10
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