1.

In the given figure, what is the radius of the inscribed semicircle having base on AB ?

Answer»

`3//2`
`5//2`
`7//5`
NONE of these

Solution :`Delta_(ACD) + Delta_(CDB) = Delta_(ABC)`
`rArr (5.r)/(2) + (3.r)/(2) = (4.3)/(2)`
`rArr 8r = 12`
`rArr r= 3//2`


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