Question

The radii of the two circle with centre X and Y are 7cm and 4cm respectively. If the distance between their centre is 11 cm, state whether the two circle will intersect or touch each other. ​

Answer 1

Given : The radii of the two circle with centre X and Y are 7cm and 4cm respectively.  

the distance between their centre is 11 cm,  

To Find :  whether the two circle will intersect or touch each other

Solution:

Join XY using straight line

XY = 11 cm as   the distance between their centre is 11 cm,  

11 = 7 + 4

= Sum of radius

Hence circles touches each other

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