Q1 of 59 Page 58

Two circles having radii 3.5 cm and 4.8 cm touch each other internally. Find the distance between their centres.

Given: Two circles are touching each other internally.


∵The distance between the centres of the circles touching internally is equal to the difference of their radii.


⇒distance between their centres = 4.8 cm – 3.5 cm = 1.3 cm


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What is the distance between two parallel tangents of a circle having radius4.5 cm ? Justify your answer.

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