1.

The centre of a circle is (2a, a - 7). Using Distance Formula, find the values of a if the circle passes through the point (11,-9) and has diameter 10√2 units .​

Answer»

ong>Answer:

By given

" " ...(i)
[

distance between TWO POINTS


Given that , length of diameter


Length of radius



Put this value in Eq. (i) , we get


Squaring on both sides , we get





" " [by FACTORISATION metghod]




Hence , the required values of a are 5 and 3.



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